The scatterplot shows the number of people in each of 8 different households and the average amount of money each household spent on groceries

Weekly Grocery

Expenses

Exhibit

3201

280

240

200

(dollars

Groceries

9

160

120

Weekly Grocery Expenses, Number of people in Household Average Amount Spent on Groceries, dollars, xy

80

40

4

6

8

Number of People

In Household

Based on the scatterplot, what is the best prediction of the average amount of money spent on groceries for a household that has 7

people?

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?