A company has found that its rate of expenditure(in hundreds of dollars) on a certain type of job is given by E'(x)=10x+10, where x is the number of days since that start of the job

50

Step-by-step explanation:

where x is the number of days since that start of the job.

To Find the rate of expenditure if the job takes 4 days.

Substitute 4 for x

E'(x)=10x+10

E(x) = 10(4) + 10

E(x) = 40 + 10 = 50

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40

answer: the answer is ann