Answer:
23 + 16 = 39
39 - 16 = 23
the student did not reverse the sum correctly
weight is a force
force=mass times acceleration
weight=24.52*0.59=14.4668N
Answer:
n = 43 samples
Step-by-step explanation:
Error margin, E = 0.15
Confidence Interval, CI = 95% = 0.95
Significance level, α = 1 - 0.95
α = 0.05
α/2 = 0.025
To calculate population proportion, the sample size formula is:
n = 0.25 [(Zα/2) /E]²
Zα/2 = Z₀.₀₂₅ = 1.96
n = 0.25 * [(Z₀.₀₂₅)/E]²
n = 0.25 * [1.96/0.15]²
n = 42.68
n = 43 samples
Answer:
The lengths 7, 40 and 41 cannot be sides of a right triangle. The lengths 12, 16, and 20 can be sides of a right triangle.
Step-by-step explanation:
You can test this by using the Pythagorean theorem, which states a^2+b^2=c^2
with 7,40 and 41
7^2+40^2 does not equal to 41^2
but with 12,16, and 20
12^2+16^2=20^2
therefore, the last statement is correct.
They never cross, and never will.