Answer:
A≈12.57cm²
Step-by-step explanation:
A=1
4πd2=1
4·π·42≈12.56637cm²
Answer:
a) 91 1/6 gallons
b) 2502 miles
Step-by-step explanation:
You are given a number of miles and a number of gallons for the car. The ratio of these numbers is ...
(261 mi)/(14.5 gal) = 18 mi/gal
We presume this value is constant for this car. Then the questions can be answered by forming and solving a proportion:
a) 1641 miles/(gallons) = 18 mi/(1 gal)
Multiplying by gallons and dividing by 18 mi/gal, we get
1641/18 gal = (gallons) = 91 1/6 gal
It will take 91 1/6 gallons of gasoline for Mary to drive to her friend's house.
___
b) Same deal, but the miles are unknown.
(miles)/(139 gal) = (18 mi)/(1 gal)
Multiplying by 139 gal gives ...
(18 mi)·139 = (miles) = 2502 mi
139 gallons of gasoline will let Mary drive 2502 miles.
5a-5=7+2a -- we need to isolate a. Subtract 2a from both sides
3a-5=7 -- add 5 to both sides
3a=12 -- divide by 3
a=4
The answer to 82 times 82 is 6724.
Answer:
$20.51 tip Russell leaves
Step-by-step explanation:
18.99 per weight
buys 9 weights
18.99 x 9 is 170.91
170.91 x 12% is 20.51 tip
170.91+20.51=$191.42
