To calculate it use pythagoras: a^2+b^2=c^2
7^2+10^2=49+100=149
calculate the square root:
so the diagonal is about 12.2 inches long
Answer:
(0,-2) (2,4)
Step-by-step explanation:
All you have to do is subsitute the x values in the equation
(0,-2)
(2,4)
The formula for the volume of a cone is V = PI x r^2 x h/3
r = 1/2 the diameter. 1/2 of 8 = 4 inches.
h = height = 12 inches.
Using 3.14 for PI, the formula now becomes:
V = 3.14 x 4^2 x 12/3
V = 3.14 x 16 x 4
V = 200.96 cubic inches.
You do not say if the answer needs to be rounded, so round the answer as needed.
Answer:
$32.80
Step-by-step explanation:
Let f be the cost of a file, then a storybook costs 3f ( 3 times as much )
Then the difference in cost is
3f - f = 16.40, that is
2f = 16.40 ( divide both sides by 2 )
f = 8.20
The cost of a file is $8.20 and the cost of a storybook is 3 × $8.20 = $24.60
The total cost of the 2 items = $8.20 + $24.60 = $32.80