Idon’t know how to find a and b. for a) i used the slope formula to find the derivative using the end points but i end up with -49.346 price/quantity. for b) i need to make sure my derivative is correct before i start plugging in those numbers

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1

$15 each

step-by-step explanation:

$45/3 children= $15 each

a triangular prism is a 3 dimensional shape composed of triangles and rectangles. it is made from two triangular bases and three rectangular sides.  

a

step-by-step explanation: