The average 11-year-old boy would<span> be around 55 inches tall and </span>weigh<span> around 80 pounds. </span>
Answer:
B
Step-by-step explanation:
The recommended sample size n for point estimates is:
n = NX / (N + X - 1)
where N is the population size, and X is defined as:
X = Z² p (1 - p) / E²
where Z is the critical value, p is the sample proportion, and E is the margin of error.
Assume a confidence level of level of 95% and a margin of error of 5%.
α = 0.05, Z(α/2) = 1.96
E = 0.05
Of the 40 units tested, 2 had lifespans less than 26 days. So the proportion is:
p = 2/40 = 0.05
Therefore:
X = (1.96)² (0.05) (1 - 0.05) / (0.05)²
X = 73
Given N = 2000:
n = (2000) (73) / (2000 + 73 - 1)
n = 70.45
Rounding, the recommended sample size is 70.
4x-5=9
4x=9+5
4x=14
x=14/4 or 3.5
Answer:
c. -16x + 74/5
Step-by-step explanation:
2(x+7) -18x + 4/5 = 2x + 14 -18x + 4/5
2x-18x = -16x and 14 + 4/5 = 74/5
Answer:
see below
Step-by-step explanation:
-3,12,-48,.........
the first term is =-3
The ratio is / = 12/-3 = -4
The recursive formula is
= r*
= -3 *
The explicit formula
= * r^ (n-1)
= -3 * -4^ (n-1)
To find the 6th term let n=6
= -3 * -4^ (6-1)
= -3 * -4^ (5)
= -3 * -1024 =3072