(100 points) A cone-shaped table centerpiece has a diameter of 14 cm and a slant height that measures 31 cm. What is the surface area of the centerpiece? (Use 3.14 for Pi and round to the nearest hundredth. Recall the formula S A = pi r l + pi r squared.) ANSWER CHOICES-
A-681.38 cm^2

B-835.24 cm^2

C-1,362.76 cm^2

D-1,978.20 cm^2

answer: 0.1,0.85

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.

146

step-by-step explanation:

the answer should be:

a. 3, 4, and 6

b. 18, 24, and 36

c. 4.8, 6.4, and 9.6

hope i

-lavira : )