The ratio of dogs to cats
7 to 2
Let’s look at the answers and cross out some of them
A seems valid, 7/2= 3.5
So B is wrong because 7 is the number of dogs not the number of total animals.
C is wrong because this is a ratio, and if the ratio is 7:2 then there could be 14:4 dogs and cats. 14 — 4 isn’t 5. We are not certain there are exactly this much dogs and this much cats.
D) For every 7 dogs there are 2 cats. 7/2 is dogs divided by cats, while 2/7 is cats divided by dogs
So the correct answer is A
Answer:
$4,500
Step-by-step explanation:
For simple interest,
I = prt,
where
I = interest
p = principal
r = annual interest rate
t = number of years
We have p = $5,000, r = 9% = 0.09; t = 1 year
I = $5,000 × 0.09 × 1
I = $450
Answer:
The approximate 90% confidence interval is;
70,244 to 70,732
Step-by-step explanation:
Here, we want to calculate the approximate 90% C.I for the situation
Mathematically;
CI = mean ± (z * SD)/√n
From the question;
mean = 70,438
SD = 645.3
n = 30
we can get z from the CI table
90% CI is same as; 1.645 z-score
So , substituting these values;
CI = 70,438 ± ( 1.645 * 645.3)/√30
CI = 70,438 ± 194
So the CI = 70,438 -194 to 70,438 + 194
= 70,244 to 70,732
Answer:
A. is 0
B. is -30
C. is 0
Step-by-step explanation:
Hope this helps!
