Answer: |p-72% |≤ 4%
Step-by-step explanation:
Let p be the population proportion.
The absolute inequality about p using an absolute value inequality.:
, where E = margin of error, = sample proportion
Given: A poll result of 72% with a margin of error of 4% indicates that p is most likely to be between 68% and 76% .
|p-72% |≤ 4%
⇒ 72% - 4% ≤ p ≤ 72% +4%
⇒ 68% ≤ p ≤ 76%.
i.e. p is most likely to be between 68% and 76% (.
A right circular cone has a circle as its base.
All answers that have B = l * w cannot be correct as that is the area of a rectangle, not a circle.
The area of a circle is A = pi r^2, so you need B = pi r^2 in the formula.
The only formula that is correct is choice D. V = 1/3 Bh, where B = pi r^2
Answer:
---- Hao Sheng
--- His father
---- His grandfather
Step-by-step explanation:
Given
From the question, we have:
--- The average of their age
--- 4 years ago
Required
Their current age
Open bracket
Make z the subject
Multiply by 12
Substitute in
Collect like terms
Substitute in
Multiply through by 3
Collect like terms
Make y the subject
Substitute in
Collect like terms
Divide by 7
Solve for y in
Solve for z in
Answer:
5
out of
5
(
2
)
+
5
(
−
5
t
)
.
5
(
2
−
5
t
)
Step-by-step explanation: