ElectricPavlov

18 mg  / 20 mg  x 100% = 90% RDA Niacin

Boyle's Law   PV = k

so

P1 V1 = P2 V2

P1/ P2  V1 = V2

20.5/80.5  (400 ) = 20.5*400/80.5 = 101.86 ml

They DO know what dividing by zero is : it is an ERROR   

11 C 3 = 165 combo choices

If you substitute in the values of 'x' in to the equation, you will see that the 'y' value calculated is true for all of the ordered pairs ....except the LAST one.

I do not think that formula is correct....this question has a payment on the First of the period not one period away:

THIS is about the formula that you posted:

The future value of an annuity formula is used to calculate what the value at a future date would be for a series of periodic payments.

The future value of an annuity formula assumes that

1. The rate does not change
2. The first payment is one period away
3. The periodic payment does not change

Multiples of 5  = 20

Multiples of 7 =14

Multiples of BOTH    35  70         34 - 2 = 32

1 inch = 2.54 cm

36 in^2  x  (2.54 cm/in)^2 = 232.26 cm^2

FV = (1+r) *P [(1+r)^n-1]/r
 

The future value of annuity due formula is used to calculate the ending value of a series of payments or cash flows where the first payment is received immediately. The first cash flow received immediately is what distinguishes an annuity due from an ordinary annuity. An annuity due is sometimes referred to as an immediate annuity.

Unclear from your question wording if 1 payment then 18 more   or just 18 payments....this calc is for 19 payments...if it is 18 , just change the 19 to 18

Fv = (1+.0625) * 1000 [(1+.0625)^19-1]/.0625

    =E  36789.65

2 / n^s       n is the number and s is the number of times