A) work out the radius of the mercury, giving your answer as an ordinary number

Answer:

15

Step-by-step explanation:

w(t) = -2t+1,

Let x =-7

w(-7)= -2(-7) +1

        =14+1

        =15

Answer:

the slope is 2 and a=8 b=6

Step-by-step explanation:

Answer:

16/5

Step-by-step explanation:

1600 diviudes by 100=16

Saul's commission is worth $400.

Given:
Sales commission rate = 2%
Sales = 20,000

Simply multiply the rate to the sales amount to get the value of Saul's commission.

$20,000 x 2% = 400 sales commission.

Answer:

A) 24 ways

B) 4 ways

Step-by-step explanation:

a) permutation occurrs when order of choices matters.

N = 4P3 = 4!/(4-3)! = 4!/1!

N = 24 ways

b) combination occurs when order of choices doesn't matter.

N = 4C3 = 4!/3!(4-3)! = 4!/3!(1!)

N = 4 ways