Hi i need with these questions

for 18 i got $28 100×.04×7

and for 19 i got $348.92

300(1+.051 or [5.1/100] /2)to the power of 6 or [3×2]

Step-by-step explanation:

Simple interest is Principal × Rate ×Time but you turn the rate into a decimal

Compounded interest is (F)inal (V)alue(1+(r)ate/(n)umber of times interest is compounded) to the power of (N×T)ime

c.35

step-by-step explanation:

8+13=21

21+8=29

29+6=35

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

hope to and hope that my answer is brainliest.(follow me )