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MATH SOLVE
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If we put a cool object into a preheated oven, Newton's law of heating tells us that the difference between the temperature of the oven and the temperature of the object decreases exponentially with time. The percentage rate of decrease depends on the material that is being heated. Suppose a potato initially has a temperature of 75 degrees and the oven is preheated to 375 degrees. Use the formulaD = 300 � 0.98t,where D is the temperature difference between the oven and the potato, t is the time in minutes the potato has been in the oven, and all temperatures are measured in degrees Fahrenheit.What is the temperature of the potato after 20 minutes? (Round your answer to the nearest degree.)- I'm slightly confused by this problem because when I put D=300 times 0.98^20 it gives me 200 and it says this answer is wrong. What am I doing wrong is 20 not what i plug in for t?
General
4 months ago
Question 3,4&5 Cindy bought a car for $21,330. A few years later she sold the car for $19,700.find the percent of change in the value?
General
4 months ago
The width of a confidence interval estimate for a proportion will be A. narrower for 99% confidence than for 95% confidence. B. wider for a sample size of 100 than for a sample size of 50. C. narrower for 90% confidence than for 95% confidence. D. narrower when the sample proportion is 0.50 than when the sample proportion is 0.20.
General
4 months ago
A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 46.046.0 and 56.056.0 minutes. Find the probability that a given class period runs between 50.2550.25 and 51.2551.25 minutes. Find the probability of selecting a class that runs between 50.2550.25 and 51.2551.25 minutes.
General
4 months ago
You look over the songs in a jukebox and determine that you like 14 of the 53 songs. (a) What is the probability that you like the next four songs that are played? (Assume a song cannot be repeated.) (b) What is the probability that you do not like the any of the next four songs that are played? (Assume a song cannot be repeated.)
General
4 months ago
Suppose that each day a company has fixed costs of 400 dollars and variable costs of 0.8x+1420 dollars per unit, where x is the number of units produced that day. Suppose further that the selling price of its product is 1500−0.25x dollars per unit.a) each day, the company breaks even at production levels (blank) unitsb) the maximum daily revenue attained is (blank) dollarsc) the price that maximizes profit is (blank) dollars per unit
General
4 months ago
Kinard's Kennels Inc. ROE is 20%. Their dividend payout ratio is 70%. The last dividend, just paid, was $2.00. If dividends are expected to grow by the company's internal growth rate indefinitely, what is the current value of Kinard's common stock if its required return is 18%? Select one: a. $11.52 b. $16.89 c. $17.67 d. $14.92
General
4 months ago
A balloon is rising vertically above a level, straight road at a constant rate of 4 ft/sec. Just when the balloon is 80 ft above the ground, a bicycle moving at a constant rate of 13 ft/sec passes under it. How fast is the distance s(t) between the bicycle and balloon increasing 6 seconds later?
General
4 months ago
A manufacturer of alkaline batteries has observed that its batteries last for an average of 26 hours when used in a toy racing car. The amount of time is normally distributed with a standard deviation of 2.5 hours. What is the probability that the battery lasts longer than 28 hours?a. What is the probability that the battery lasts between 24 and 28 hours?b. What is the probability that the battery lasts longer than 28 hours?c. What is the probability that the battery lasts less than 24 hours?
General
4 months ago
We have a box with eight green marbles, five red marbles, and seven blue marbles. We choose three marbles from the box at random without looking. Write the probability in decimal form rounded to three places. What is the probability that they will all be the same color
General
4 months ago
Write the converse, inverse, and contrapositive of the given conditional. then determine the truth value of the statement: If you play the tuba, then you play an instrument.Help please! Thank you!
General
4 months ago
Square GHIJ shares a common center with regular hexagon ABCDEF on a coordinate plane. AB¯¯¯¯¯ is parallel to GH¯¯¯¯¯. If the combined figure rotates clockwise about its center, at which angle of rotation will the image coincide with the preimage?60°180°90°240°
General
4 months ago
PLEASE HELP DUE TODAY!!!!while browsing in an antique store, cameron found this page that came from an old book of riddles
General
4 months ago
A store manager realizes that he has too many jeans in stock. After he finished taking inventory, he has a total of 688 jeans. He decides to reduce the stock by having a buy one get one free sale. That means that every purchase will reduce this inventory by 2 pairs of jeans.The expression below describes this situation.688−2xIn this expression, what does the term 2x represent?A. the number of jeans purchasedB. the total amount of jeans in stockC. the number of jeans the stock is reduced by from each saleD. the number of jeans sold with each purchase
General
4 months ago
If one-third of a number is greater than five less than twice the number, which of the following is true? x < 3, x > -3, x > -3/5, x < 3/5
General
4 months ago
To start the school year, a teacher spends $54.35 in school supplies for her classroom. During the course of the year, she will restock her supplies and will spend $22 each time she restocks the supplies. The expression below describes this situation.22x+54.35In this expression, what does the term 22x describe?A. the amount she spends restocking her suppliesB. the total amount she spends money on restocking her suppliesC. the number of times she restocks her suppliesD. the amount she originally spends on supplies
General
4 months ago
Graph 24x+25=−6y+7 .How would I go about doing this? can someone give me a step by step process?
General
4 months ago
PLEASE PLEASE HELP IM LITERALLY CRYING.Let f(x)=8x. The graph of f(x) is transformed into the graph of g(x) by a vertical stretch of 4 and a translation of 7 units down.What is the equation for g(x)?Enter your answer in the box.g(x)= ????
General
4 months ago
What are the x and y-intercepts of the line described by the equation? 3x−9y=10.8 Enter your answers, in decimal form, in the boxes.
General
4 months ago
Which will result in a difference of squares? (–7x + 4)(–7x + 4) (–7x + 4)(4 – 7x) (–7x + 4)(–7x – 4) (–7x + 4)(7x – 4)
General
4 months ago
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