You measure the average weight of people in San Francisco by using random sampling. You chose a sample of 100 people. The mean weight on this sample was 180 lb with standard deviation of 15 lb. You need to estimate the average weigh with the accuracy of 2" with the confidence of 95%.

Question: Is the sample size sufficient for this task?

answer: #1 ads up by 8 and i don't know #2

a) at most means it can cost $12 or less

so the inequality sign would be ≤

you would then need to multiply the number of toppings by the 0.35 for each one and add it to the cost of the cheese pizza.

the equation would be 9.99 + 0.35x ≤ 12

b) using the above equation:

9.99 + 0.35x ≤ 12

subtract 9.99 from each side:

0.35x ≤2.01

divide both sides by 0.35:

x ≤ 2.01 / 0.35

x ≤5.74

at most you could have 5 toppings.

the 5 topping pizza would cost: 0.35 x 5 = 1.75 + 9.99 = $11.74

tayeserqp p201311