Answer:
option C
Step-by-step explanation:
(x+4)(x-4) = x^2 - 16
Answer:
The 98% confidence interval for the mean amount spent on their child's last birthday gift is between $40.98 and $43.02.
Step-by-step explanation:
We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 24 - 1 = 23
98% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 23 degrees of freedom(y-axis) and a confidence level of
. So we have T = 2.5
The margin of error is:

In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 42 - 1.02 = $40.98.
The upper end of the interval is the sample mean added to M. So it is 42 + 1.02 = $43.02.
The 98% confidence interval for the mean amount spent on their child's last birthday gift is between $40.98 and $43.02.
Answer:
The area of triangle is 1263.6 mm².
This is an Equilateral triangle.
Step-by-step explanation:
Given that the area of triangle formula is A = 1/2×base×height. So you have to substitute the values into the formula :

Let base = 54mm,
Let height = 46.8mm,



This is the <u>E</u><u>q</u><u>u</u><u>i</u><u>l</u><u>a</u><u>t</u><u>e</u><u>r</u><u>a</u><u>l</u><u> </u><u>t</u><u>r</u><u>i</u><u>a</u><u>n</u><u>g</u><u>l</u><u>e</u> because all sides of the triangle are <u>e</u><u>q</u><u>u</u><u>a</u><u>l</u>.
Answer:
5.70 < X < 5.89
Step-by-step explanation:
Z = ±1.40507156
z = (x - μ)/σ
1.40507156 = (x - 5.8)/.07
5.70 < X < 5.89
Answer:
The coefficient of the quadratic term ,a,determines how wide or narrow the graphs are, and
weather the graph turns upward or downward
Step-by-step explanation:
this is your answer