Step-by-step explanation:
r-5r-6s+8s-15
-4r+2s-15
= 2s-4r-15
As an improper fraction, it is

.
Answer:
65.45
Step-by-step explanation:
Zscore = (x - mean) / standard deviation
x = score
Percentage below C :
D = 18% ; F = 12%
Sum = 30%
Obtain the Zscore for the proportion below D
P(Z < 0.30) = -0.524
Hence, Zscore = -0.524
Put Zscore = -0.524 in the equation :
-0.524 = (x - 72) / 12.5
-0.524 * 12.5 = x - 72
-6.55 = x - 72
-6.55 + 72 = x
x = 65.45
To receive a grade of C or better, score must be atleast 65.45
Answer:
$621.08
Step-by-step explanation:
The formula for the amount (A) resulting from principal P being invested at rate r continuously compounded for period t is ...
A = Pe^(rt)
Filling in the given numbers and doing the arithmetic, we get ...
A = $400e^(0.055·8) ≈ $621.08
Answer:
462 000mg
Step-by-step explanation:
1gram = 1000milligrams
Hence...462 grams...,
; 462 × 1000 = 462 000mg