Pls help me need help

[See Below]

Step-by-step explanation:

✦ So think of finding a semi-circle like a regular circle. Just Find the Circumference like usual:

  ✦ 2 × π × 5 = 31.41

✦ Now that we've done that all you have to do is divide by 2 since a semi-circle just means half of a regular circle:

  ✦ 31.41 ÷ 2 = 15.707 or If rounded 15.705

✦ You could also use the formula for a semi-circle:

  ✦ ½ × 2 × π × r

~Hope this helps Mate. If you need anything else feel free to message me.

according to this law, when unemployment goes up by 1%, gdp drops by 2%. in the question, unemployment rate goes from 2% to 5%, meaning unemployment goes up by 3%, so the gdp drops by 6%. thus the effect is a drop in gdp by 6%.

step-by-step explanation:

answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3

step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.

sorry i don't know the other answer. i didn't learn what a proportional relationship is.