Suppose a teacher assigns an average of 9.3 homework problems per learning target. Find: a) The probability that the teacher assigns 4 homework problems for LT5A. Round your answer to 4 decimal places.

b) The probability that that the teacher assigns 18 homework problems for LT5B. Round your answer to 4 decimal places.

What would be considered a "usual" number of homework problems assigned? Use the definition of usual as μ ± 2⋅ σ

1) neither are usual
2) 4
3) 18
4) both are usual

4) both are usual

Step-by-step explanation:

a. she will receive a refund of $278.

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