Question

HELP ME PLEASEEEE!!!
- A bakery charges $0.30 for a cookie that is 3 inches in diameter. If the price is proportional to the area, how much do they charge for an extra large cookie that is 6 inches in diameter? Assume that each cookie is shaped of a circle.

Answer 1

can you help me, and i will help you back as well?

Answer 2

what do you needl help on?

Answer 3

A = πr^2
A = π(9/4)
A = 2.25π
0.3 : 2.25π = x : 9π
x = 1.20π or x ≈ 3.77

Answer 4

What are the x-intercept(s) of the graph of the equation y − x^2 = −4x − 5?

(1, 0) and (−5, 0)

(1, 5)

(−1, 0) and (−5, 0)

(−1, 0) and (5, 0)

Answer 5

To find the x intercepts, set y = 0, and solve.
BTW, note that answer B cannot be correct because it doesn't have y = 0!
So with y=0 you have ---> x2 - 4x - 5 = 0
This can be expressed as (x+1)*(x-5) = 0
This can be solved separately as x+1 = 0 and x-5 = 0 to find the two answers.

the answer is D