There are 5 red marbles, 4 blue marbles and 7 black marbles in a bag. Like the theoretical P(choosing a red)

Step-by-step explanation:

1. To find the answer, add up all the marbles.

4+5+7= 16

2. Because 16 is the total number of outcomes, it will be the denominator.

3. Because 5 is the number of desireable outcomes, it will be the numerator.

(Note: the decimal equivalence is 0.3125).

(Note: the ratio equivalence is 5:16).

(Note: the percent equivalence is 31.25%).

The answer is in the image 

SI=(P*R*T)/100

P=2000

R=1.5

T=6

SI=(2000*1.5*6)/100

=(2000*9)/100

=180

Neil will earn interest of 180

Cost of 7 gallons=$24.50

Cost of 1 gallon=24.50/7=3.5

Cost of 15 gallons=15*3.5=52.5

Cost of 15 gallons will be $52.5

The answer is in the image 

The answer is in the image 

The answer is in the image 

Salesperson will make 6% of 1800

=(6/100)*1800

=108

Salesperson will make $108 in $1800 sales

Here,

tip=18%of $32

tip=(18/100)*32

=0.18*32

=$5.76

Total payment=32+5.76=$37.76

Speed=Distance/time

Here,

distance=15m

time=1sec

speed=15/1=15m/sec

Distance=Speed*time

time=15min=15*60sec=900sec

Distance travelled in 15 min=15*900=13,500m

=13500/1000 km=13.5Km