The zoo increases the amount of food that the bear eats each week from 105 pounds to 115 pounds. What is the percent increase in the amount of food that the bear eats each week. Round your answer to the nearest tenth of a percent.

7875 parts

Step-by-step explanation:

#Find the number of parts cut by the machine per hour:

#Find the number of parts per machine per hour:

#Given that only 5 machines are now working for 4.5 hrs, we calculate the total parts as:

Hence, the total parts cut by 5 machines is 7875 parts

b

step-by-step explanation:

calculate the scale factor as the ratio of corresponding sides, image to original, that is

scale factor = = = = 1

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.