Ineed 18,19,& 20•ignore my writing

Part 18) Option D 100 square meters

Part 19) Option A 60 cubic meters

Part 19) Option C. 212 cubic centimeters

Step-by-step explanation:

Part 18) Estimate the surface area of the prism

we know that

The surface area of the prism is equal to

where

B is the area of the base

P is the perimeter of the base

H is the height of the prism

Find the area of the base B

Find the perimeter of the base P

we have

substitute

----> exact value

Estimate the surface area

we have

----> round up

----> round down

Estimate the area of the base B

Estimate the perimeter of the base P

substitute in the formula

Part 19) Estimate the volume of the prism

The volume of the prism is equal to

we have

substitute

----> exact value

Estimate the volume

we have

----> round up

----> round down

Estimate the area of the base B

substitute in the formula

Part 20) The volume of the prism is equal to

we have

substitute

----> exact value

Estimate the volume

we have

----> round up

----> round down

Estimate the area of the base B

substitute in the formula

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c