Answer:
160 minutes.
Step-by-step explanation:
2 miles per 40 minutes for 8 miles
dived 8 by 2 and then multiple by 40
Answer:
A) Population standard deviation is known.
B) Option 3
H0: μ =520,
H1: μ ≠ 520
z > 1.96 or z < -1.96
Step-by-step explanation:
A) The normal distribution should be used for the sample mean because the population standard deviation is known. Usually, when the standard deviation is unknown we don't use normal distribution except there is an underlying normal approximation.
B) Null Hypothesis:H0: μ =520,
Alternative hypothesis H1: μ ≠ 520
At 5% level of significance, from standard tables, we will reject H0 if;
The test statistic; z > 1.96 or z < -1.96
7 is the third one. 8 is the first one. 9 is the second one.
A circle and a triangle can intersect in a point.
<h3>What is intersection at a point?</h3>
This refers to the fact that two lines are able to meet at a given point. The point where they meet is the point of intersection.
A circle is known to be able to intersect with a triangle in three different ways and at one point.
Read more on intersection here:
brainly.com/question/2065148
#SPJ1
Answer and Step-by-step explanation:
2x + 2 is the answer.
If the boy is twice as old, and the sister's age is represented by <em>x</em>, then we multiply 2 to x to represent the boy's age.
Then we add 2 when 2 years pass by.
<em>#teamtrees #PAW (Plant And Water)</em>
