Answer:

Step-by-step explanation:
The formula of a lateral area of a cone:

r - radius
l - slant height
The formula of a surface area of a cone:

We have r= 8in and l = 21in. Substitute:


Answer:
The third answer
Step-by-step explanation:
Remember power over root and the 2 would not be under the root.
(X²-8X+5)-(-3X²+5X-9)
=X²-8X+5+3X²-5X+9
=4X²-13X+14
That's your answer lovely~
6.5% of 478.....turn ur percent to a decimal...." of " means multiply
0.065(478) = 31.07 <===