Answer:
45 degrees
Step-by-step explanation:
Ok I think it is 45 degrees try that if not super sorry
Answer:
21N:7m/s
? :10m/s
21x10=210
210÷7=30N
Your final answer is 30N
Step-by-step explanation:
This is called direct propotion
it involves close multiplication
Answer:
The result for this equation is
.
Step-by-step explanation:
-Solve:

-Multiply
and
by
:

-Reduce
to the lowest term by extracting and canceling out 3:

-So, the result is
.
Answer:
a.1.90 years
Step-by-step explanation:
We have that to find our
level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of
.
So it is z with a pvalue of
, so 
Now, find the margin of error M as such

In which
is the standard deviation of the population and n is the size of the sample.
In this question:

So

So the correct answer is:
a.1.90 years