Find area of circle
A=pir^2
A=pi5^2
A=25pi
then find how much the central angle is
whole circle is 2pi radians
(3pi/2)/2pi=3pi/4pi=3/4
it is 3/4 of whole area
area=25pi units^2
3/4 times 25pi=75/4pi units^2=
18 and 3/4 pi square units=
18.75ip square units
28% is the percent of prime numbers less than 100 that have a units digit of 3.
A prime number is a number above 1 that is only divisible by 1 and itself.
There are 25 prime numbers that are below 100.
These numbers are:
2, 3, 5, 7, 11, 13, 17, 19, 23, 29,
31, 37, 41, 43, 47, 53, 59, 61, 67, 71,
73, 79, 83, 89, 97
There are 7 numbers that have a units digit of 3.
3, 13, 23, 43, 53, 73, 83
The percentage of prime numbers less than 100 that have units digits of 3 is: 28%
7 / 25 = 0.28 * 100% = 28%
Legs legnth a and b, and hypotnuse c
a^2+b^2=c^2
legs are 9 and 12
a=12
b=9
12^2+9^2=c^2
144+81=c^2
225=c^2
sqrt both sides
15=c
the legnth of the hyptonuse is 15 inches
I am assuming Michael's interpretation is correct, that you want to find how much gas is used in 4 days knowing how much is used in 5 days. Set up a simple proportion and solve it:
3/4 tank → 5 days
x tank → 4 days
x = 4 * (3/4) / 5 = 3/5 of a tank
In 4 days you use 3/5 of a tank.