Blake bought a total of 24 doughnuts. Each doughnut cost
$0.84, including tax. Of the
doughnuts he bought, 5/8 were
glazed doughnuts. What was the
total cost of the glazed doughnuts?

$27.60

Step-by-step explanation:

Step 1: Find 5 over 8 of 24

doughnuts were glazed. So the total is 24. Now we just have to find 5 over 8 of the total.

Or

Cross divide 8 and 24

So we are left with

Remember, "1" doesn't change anything.

Simplify

Therefore, the cost of the glazed doughnuts WITHOUT TAX is $15.

Step 2: Add the tax to the cost of the glazed doughnuts.

To find the tax or sales tax, just multiply the sales tax (in decimal form, but it already is) to the total.

Now, add the result to the total.

(you don't have to add the zeros, but it still won't change anything)

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.