How do you do letter b?

0.8632

0.8696

Step-by-step explanation:

Your answer is accurate, but it's not the most precise option.

f(x) is decreasing and concave up on the interval.  Therefore, trapezoidal rule will give us an area greater than the actual area, but closer than left-hand rule.

If f(x) were a straight line, then midpoint rule would give us the same area as trapezoidal rule.  However, since f(x) is concave up, the midpoint is less than the average of the endpoints.  So midpoint rule will give us an area less than the actual area, but closer than right-hand rule.

answer:   expression= p+p*d%

price reduction + sale price = $625

sale price: $p+$p*d%

where d% is the percentage of discount

step-by-step explanation:

original price = p

price went down by $150 price reduction $p*d%

sale price= $ 475

therefore the price before sale is: $625

and the expression that shows the price before sale is: p+p*d%

a

step-by-step explanation:

its wrong