We know that
area of the circle=pi*r²
circumference==2*pi*r----------> r=circumference/(2*pi)
circumference=25 1/7 in----> (25*7+1)/7----> 176/7 in
r=(176/7)/(2*22/7)----> r=176/44----> r=4 in
area of the circle is equal to the area of the cake
area=pi*r²---> (22/7)*4²-----> area=50.29 in²
the answer is
50.29 in²
Answer:
left
Step-by-step explanation:
The question says she used 
of it, so she probably used of it. I'm assuming this is an error in the question, and it should be asking how much is left. To solve for that:
-
make denominators equal
(
× ) - ( × 
)
- 
$140.80. The last part was a little tricky at first and then i relised that it was $7 an hour
The solution to this equation is 1=2
50 students preferred science...
Explanation:
we can consider the numbers 5 and 4 in the ratio as units
now we need to know how much each unit represent
units = 5 + 4 = 9
my sample = 90 students
each unit = 90/9 = 10 students
so each unit represents 10 students
back to the ratio
who preferred science = 5
who preferred English = 4
Number of students choose Science = 5 * 10 = 50
