Mary and Janet are running in the Applehill fun run. Mary Ron’s at 7 mph Janet at 5 mph. If they start at the same time how long will it be before they are 1.5 mi apart?

Should be within 45 minutes.

Work:

Mary:

rate = 7 mph ; time = t hrs. ; distance = 7t miles

Janet:

rate = 5 mph ; time = t hrs. ; distance = 5t miles

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify

the answer is:

the correct option:

b.

to solve the problem, we need to remember how to operate to simplify exponential expressions using the logarithms.

we are given the equation:

then, using placing logarith with base 7 on both sides of the equation, we have:

so, rounding the obtained result to two decimal places (nearest hundreth), we have:

hence, we have that the correct option:

b.

have a nice day!