Question

The function f(t)=25 sin((pi/2)t)+10 models the temperature of a periodic chemical reaction where t represents time in hours. What are the maximum and minimum temperatures of the reaction, and how long does the entire cycle take?

Answer 1

A. Maximum: 35 degrees, Minimum: -15 degrees, Period: 4 hours

B. Maximum: 25 degrees, Minimum: 10 degrees, Period: pi/2 hours

C. Maximum: 100 degrees, Minimum: -15 degrees, Period: pi/2 hours

D. Maximum: 35 degrees, Minimum: 35 degrees, Period: 8 hours

Answer 2

Please help! I'll medal and fan

Answer 3

@amistre64

Answer 4

well, sin only ranges from -1 to 1, soo ...

Answer 5

What does that mean?

Answer 6

I mean, I understand the negative/positive part, but how is it relavant to the problem?

Answer 7

that means that the function is max/min at

25(1) + 10
25(-1) + 10

Answer 8

So Max=35, Min=-15?

Answer 9

and since sin is periodic at 2pi, a complete cycle is when t*pi/2 = 2pi

Answer 10

yes, 10 +- 25

Answer 11

So A?

Answer 12

yep

Answer 13

Thank you so much! Would you mind helping me with a couple more?

Answer 14

prolly, this is cutting into my yelling at the cat time

Answer 15

XD Thank you. I know that's a precious time for bonding

Answer 16

A company offered on half of its employees a bonus if the production of gears increased by 50%. The other half of the employees was not offered a bonus. As the end of the month, production in the group that did not get the bonus offer increased by a mean of 20 and production in the bonus group increased by a mean of 40. What is the correct order of steps to determine if the results are significant?

A. Calculate the probability of 20

B. Randomly separate the employees' individual results into two groups

C. Calculate the mean of each group

D. Calculate the difference of the means

E. Run the experiment many times

Answer 17

@amistre64

Answer 18

pfft, what is your take on the steps?

Answer 19

group, run tests, calculate, compare differences, cal prob

Answer 20

I read through, but it seems as though a lot of them are similar

Answer 21

Really? It's that simple?

Answer 22

if theres no data to play with, then yeah .... the steps are the simplest part to order

Answer 23

I thought the numbers were coming into play somewhere- did they do that just to throw me off?

Answer 24

must have groups in order to run tests and collect the data

must run tests before collecting data

must collect data before working with data

must work the data before concluding the results

Answer 25

Wow. Well alright then. Thank you yet again!!

Answer 26

it may not be accurate, due to word usage and such, but thats the general idea

Answer 27

Let me type out the answer choices- none of it really matched up quite right

Answer 28

A. B, C, E, A, D

B. A, B, C, E, D

C. B, C, D, E, A

D. A, B, C, D, E

Answer 29

@amistre64

Answer 30

I'm going with BCDEA