Answer:
The answer is C
Step-by-step explanation:
The formula of a circle is pie radius ^2. Its asking for the surface area. So I got C because you do pie 18^2 and gets you approximately 1017. Although A also says 18 as the radius, it says meters. After you solve a surface area problem you do square meters or square units. For volume you have to use units cubed or units ^3. Make sure to always do this or your teacher might count you as wrong.
ANSWER
(1,-3)
EXPLANATION
The given equations are:
y = 5x - 8
y = 4x - 7
We equate the two equations to get:
5x - 8=4x - 7
Group similar terms:
5x - 4x=-7+8
Simplify bottom sides
x=1
Put x=-15 into the first equation:
y=5(1)-8
y=-3
(1,-3)
The solution is (1,-3)
Answer:
4y + 9
Step-by-step explanation:
"y times 4" means 4y because 4*y = 4y
And then "add 9."
Which would be 4y + 9.
Answer:
<u>169 sq. cm.</u>
Step-by-step explanation:
<u>Surface Area</u>
- SA (base) + SA (2 sides) + SA (2 faces)
- 9 × 5 + 2 × 7 × 5 + 1/2 × 2 × 6 × 9
- 45 + 70 + 54
- <u>169 sq. cm.</u>
Answer:
a)
b)
If we compare the p value and the significance level given we see that
we have enough evidence to reject the null hypothesis at 5% of significance.
Step-by-step explanation:
Data given and notation
n=114 represent the random sample taken
estimated proportion of people that their approval rating might have changed
is the value that we want to test
represent the significance level
Confidence=95% or 0.95
z would represent the statistic (variable of interest)
represent the p value (variable of interest)
Hypothesis
We need to conduct a hypothesis in order to test the claim that true proportion of people that their approval rating might have changed is 0.58 or no.:
Null hypothesis:
Alternative hypothesis:
Part a
(1)
Calculate the statistic
Since we have all the info requires we can replace in formula (1) like this:
Part b: Statistical decision
The significance level provided
. The next step would be calculate the p value for this test.
Since is a bilateral test the p value would be:
If we compare the p value and the significance level given we see that
we have enough evidence to reject the null hypothesis at 5% of significance.