Question

help me please

Answer 1

@jim_thompson5910

Answer 2

Sandi tracks her calories burned during water aerobics class. The number of calories she burns is expressed by the function c(t) = 350t, where t is the number of hours spent doing water aerobics.

To burn more calories, Sandi wears ankle weights during her class. The number of calories she burns while wearing ankle weights is expressed by the function b(c) = 1.2c, where c is the number of calories burned doing water aerobics without weights.

Which of the following composite functions expresses the calories, as a function of time, Sandi burns while doing water aerobics with ankle weights?

Answer 3

I feel like its A or B

Answer 4

`I feel like its A or B`

please post all of your answer choices and also say why you think it's A or B

Answer 5

oh sorry one second

Answer 6

A. b[c(t)] = 351.2t
B. b[c(t)] = 420t
C. c[b(t)] = 351.2t
D. c[b(t)] = 420t

Answer 7

I think it A or B because c can convert to t

Answer 8

you mean that c is like the input of the b function?

Answer 9

yes

Answer 10

@jim_thompson5910

Answer 11

?

Answer 12

its a or b i suggest b

Answer 13

\[\Large \color{red}{c(t) = 350t}\]

------------------------------------------------------------

\[\Large b(\color{red}{c}) = 1.2\color{red}{c}\]

\[\Large b[\color{red}{c(t)}] = 1.2(\color{red}{c(t)}) \ ... \ \text{Note 1}\]

\[\Large b[\color{red}{c(t)}] = 1.2(\color{red}{350t}) \ ... \ \text{Note 2}\]

\[\Large b[c(t)] = 1.2*350t\]

\[\Large b[c(t)] = 420t\]


Note 1: replaced c with c(t) to be more specific about what c is really refering to
Note 2: replaced c(t) with 350t on the right side. This is valid because c(t) = 350t

Answer 14

its a i think

Answer 15

So whatever the output of the c(t) function is, it is plugged into the b(c) function

which is why we get b[c(t)] overall

Answer 16

oh it is b lol

Answer 17

Oh ok thank you!!! Can you help with a couple more?

Answer 18

A survey was conducted among 100 students of age groups 7–12 years and 13–18 years to find their favorite book genre. The students had to select any one genre out of detective, adventure, and biography. Out of the 50 students in the age group 7–12 years who participated in the survey, 23 liked adventure or biography. The total number of students of both age groups who liked detective books was 28.

Using a two-way table, compute the total number of students in the age group 13–18 years who liked adventure or biography.

23
27
49
51

Answer 19

how far did you get?

Answer 20

I think its C...cuz 100-28-23 is 49

Answer 21

did you set up the 2 way table?

Answer 22

no

Answer 23

ok let's set up the 2 way table

Answer 24

I'm going to let

group A = age group of 7-12 years
group B = age group of 13-18 years