Choose all of the problems that result in an answer of 8.5.

A) 0.85 × 101
B) 85 × 101
C) 85 ÷ 101
D) 0.85 ÷ 102
E) 0.085 × 102

E

Step-by-step explanation:

Type it all into a calculator

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation:

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204