During week 2, he could type 15 words per minute, at his fourth week, he could type 30. So 30-15=15. He could type 15 words faster on week 4 than he could at week 2.
Answer:

Step-by-step explanation:
we have

Solve for h
That means ----> isolate the variable h
step 1
Multiply by 6 both sides

step 2
Divide by
both sides

Answer:
Perimeter=100 area=688.19
Step-by-step explanation:
There's a big formula for area of pentagon and I pretty tired, so unless you want me to show my work I wont
Answer:
Rectangle
Step-by-step explanation: