Ok so BFD is a 90 degree angle. So you know you have 43 in one of the spaces so that means all you have to do is take 90 and minus 43 which is 47.
Answer:
a) Option 2
b) 12
Step-by-step explanation:
Possible outcomes can be obtained using:
1) A tree diagram
2) The counting principle
4 options for the first trial, 3 for the second
4 × 3 = 12
Answer:
Step-by-step explanation:
A type 1 error is committed when a true null hypothesis is rejected. Looking at the given scenario, given that the null hypothesis, H0 states is stated as follows:
The mean age of the horses on a ranch is 6 years, then a type 1 error would be made if the conclusion states that the mean age of the horses on a ranch is lesser or greater than 6 years when it is actually 6 years. Therefore, the correct option is
You cannot conclude that the mean age of the horses on a ranch is 6 years when, in fact, it is.
Answer:
5.70%
Step-by-step explanation:
Correct word <em>"We turned a $25,000 investment of money in 1982 into $100,000 in 2007." What return (interest rate) did they really earn on their investment?</em>
No of years(1982 to 2007) = 25 years
The average annual return is R%, so $25,000 * (1 + R)^25 = $100,000
(1 + R)^25 = $100,000 / $25,000
(1 + R)^25 = 4
<em>We take 25th root on each side</em>
(1 + R)^(25*1/25) = 
1 + R = 1.0570
R = 1.0570 - 1
R = 0.057
R = 5.70%
So, the return (interest rate) they really earn on their investment is 5.70%.
7r=-7/2
divide both sides by 7 to get r by itself
(7r)/(7) = (-7/2)/(7)
if you don't quite see it, think of multiplying both sides by 1/7 instead (its the same thing as dividing by 7)
(7r)*(1/7)=(-7/2)*(1/7)
r=-1/2
