Clara estimates that the length of a hiking trail is 5.75 kilometers. She later learns that its actual length is 6.25 kilometers. What is the percent error in Clara's estimate, to the nearest tenth of a percent?

7.7%

8.0%

11.0%

11.5%

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how