Answer:
We need to sample at least 1069 parents.
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.
How many parents do you have to sample?
We need to sample at least n parents.
n is found when . So
Rounding up
We need to sample at least 1069 parents.
A. 260
Explanation
Step 1
Let
as we can see
the total of green-one headed jolo is 170
and the total for one headed jolo is =430
so, the one-headed in counted twice
so, the answer is
A.260
I hope this helps you
Answer: 40
Step-by-step explanation: x=−3
(−3)2−(7)(−3)+10
(−3)2−(7)(−3)+10
=40
First, we need to solve for t.
Inverse operation of multiplication (75*t) is division. Thus, we need to divide each side of our equation by 75 to solve for t.
75t/75= 300/75
The two 75's cross out.
t=300/75
Now we divide to solve for t.
300/75=4
t=4
Thus, t equals 4.
Our unit per hour is 4.
Our unit rate: 75
Given that , a dealer bought an article for Rs 1500 and sold it at a profit of 20% .
So , here ,
- Cost price of the article = Rs 1500.
- Profit on the article = 20% .
Since the article is sold at profit , the Selling price of the article will equal to Cost price + 20% of cost price .
Firstly let's Calculate 20% of 1500 .
= 20% of Rs 1500 .
= 20/100 × Rs 1500 .
= Rs 300 .
Hence we can find now Selling price as ,
⇒ SP = CP + Profit .
⇒ SP = Rs ( 1500 + 300 ).
⇒ SP = Rs 1800 .
<u>Hence </u><u>the</u><u> required</u><u> answer</u><u> is</u><u> </u><u>Rs</u><u> </u><u>1</u><u>8</u><u>0</u><u>0</u><u>.</u>