Which is the area of a circle with a circumference of 37.68 units? (use 3.14 for ) A. 9.42 square units B. 18.84 square units C. 37.68 square units D. 113.04 square units

D

Step-by-step explanation:

First solve for r from the circumference C=2πr

37.68 = 2 x 3.14 x r

37.68 = 6.28r

r = 6

A=πr2

A = 3.14 x 36

A = 113.04

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation:

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500