Answer:
where's the picture bro?
Step-by-step explanation:
so you are going to use the Pythagorean theorem on the smaller triangle to find the connecting side's length

now you can find the bigger triangle's hypotenuse

c=4
158.71 rounded to the nearest ten dollars would be $160.00
then to estimate 10% since 10% starts with a 1, just remove the zero from both numbers
so 160 becomes 16
the tip would be $16
Pi is just 3.14--- math questions will most likely ask you to round to the nearest tenth or something of the sort -