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yuradex [85]
2 years ago
8

Chapter 2 Review

Mathematics
1 answer:
Ivan2 years ago
4 0
It’s A
Because I just did it
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Find the surface area of the square pyramid shown below. (Measurements in picture)
Sloan [31]

Given:

Side length of base = 8

Slant height = 6

To find:

The surface area of the square pyramid.

Solution:

Surface area:

$SA=A+\frac{1}{2} p s

where A is the area of base

p is the perimeter of base

s is the slant height

Area of base (A) = 8 × 8

                           = 64

Perimeter of base(P) = 4 × 8

                                  = 32

Substitute these in the formula:

$SA=64+\frac{1}{2} \times 32 \times 6

$SA=64+96

$SA=160

The surface area of the square pyramid is 160 unit².

8 0
2 years ago
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Which is the solution to the equation 2.6 a + 18.4 = 28.8? Round to the nearest tenth if necessary.
son4ous [18]

Answer: a=4

Step-by-step explanation:

4 0
2 years ago
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Sergio is creating a college fund for his son Diego, who is now 4 years old. Sergio put $1600 in a CD that will earn 8.25% simpl
Vesnalui [34]

well, Diego is 4 now, so by his 18th birthday that'll be 14 years later.

~~~~~~ \textit{Simple Interest Earned Amount} \\\\ A=P(1+rt)\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill & \$1600\\ r=rate\to 8.25\%\to \frac{8.25}{100}\dotfill &0.0825\\ t=years\dotfill &14 \end{cases} \\\\\\ A=1600[1+(0.0825)(14)]\implies A=1600(2.155)\implies A=3448

5 0
1 year ago
A biology teacher has developed a new method of teaching chi-square tests to her students. She claims this new method will impro
Illusion [34]

Answer:

A Type I error would occur if there was no evidence of an improvement on the national exam but there really was improvement.

Step-by-step explanation:

A type 1 error simply occurs when we incorrectly reject a true null hypothesis. In the scenario above, An experiment was conducted in other it know if there is sufficient evidence to support a claim that a new teaching method developed improves students score. If this claim is actually true in the real sense. However, after conducting a statistical test, we conuded that there was no sufficient evidence to support her claim of improvement using the new method, hence, the claim was rejected. By rejecting the claim, a true null has been rejected. Hence, a type 1 error has been committed.

7 0
3 years ago
What is the surface area 1ft 1ft 1ft?
Elodia [21]

Answer:

6 ft^2

Step-by-step explanation:

If the object in question is a cube, then we could say the length is 1, the depth is 1 and the height is 1, in which case each side of the cube has an area of 1 ft^2.  

There are 6 such sides, so the total surface area is 6 ft^2.

Next time please be explicit in naming the shape, either verbally or with a diagram.

4 0
3 years ago
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