Answer:
Step-by-step explanation:
12.
the formula for the volume of a cone is V=1/3hπr²
549.5 = 1/3(21)(3.14)(x)^2
549.5 = 7(3.14)(x)^2
549.5 = 21.98(x)^2
549.5 = 21.98(x)^2
divide by 21.98 on both sides
25 = (x)^2
sqrt 25 = sqrt x^2
5 = x
13.
the formula for the volume of a sphere is V=4/3πr^3
v=4/3(3.14)9^3
v=4/3(3.14)729
v=(4.186)729
v=3052.08
14.
the formula for the volume of a sphere is V=4/3πr^3
523=4/3(3.14)r^3
523=4/3(3.14)r^3
523=(4.186)r^3
divide by 4.186 on both sides
124.92=r^3
cube root on both sides
4.998=r
round
5=r
<em><u>Please mark brainliest this took me a while</u></em>
Easiest way to work it out is to divide by ten, that gives 10% of your original number. Multiply that by two to get 20% and minus that from the original number to get the discount.
450/10 = 45 which is 10% of 450.
20% of 450= 10% x 2 or 45 x 2
therefor 20% of 450 is 90.
450-90 = the discount the shoppers recieve.
Figure A, the rectangle in the top left corner is the correct answer.
Answer:
17=s+7
-7 -7
-----------
10 0
s=10
Step-by-step explanation:
-Subtract 7 from both sides
-Remove the 0 and the addition sign
-You are now left with the equation s = 10
-Once you check to make sure 10 + 7 = 17 you have your answer
Hope this helps :))
Answer:
the area of the sidewalk is 336 Sq. ft.
Step-by-step explanation:
8 + 25 = 33
8 + 9 = 17
17×33 = 561
25 × 9 =225
561-225=336
