A car race travles at constant speed . it can complete 4 laps of race course in 48 miuntes.

how long dose it take to complete 10 laps?

It takes 2 hours  to complete 10 laps.

Step-by-step explanation:

Given,

A car completes 4 laps in 48 min

To find the time it takes to complete 10 laps.

Method

We will apply the unitary method to solve it.

For 4 laps it takes 48 min

For 1 lap it takes (48÷4) min = 12 min

For, 10 laps it takes 12 × 10 min = 120 min

= 2 hours

The time is taken = 2 hr

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,