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2 years ago

2 QUESTIONS

Mathematics

1 answer:

devlian [24]2 years ago

6 0

Answer:

bh + L(S1 + S2 + h)

Step-by-step explanation:

b stands for the bottom edge of the base triangle

h is the height of the base triangle

L is the length of the prism

S1 and S2 are the two edges of the base triangle

bh is the combined area of the two triangular faces

L(S1 + S2 + h) is the area of the three rectangular side faces

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What is the volume of a rectangular prism with the dimensions: base 3 1 2 cm, height 1 1 2 cm, and length 5 1 2 cm?

jenyasd209 [6]

Answer:

The volume of a rectangular prism is $28\frac{7}{8}\ cm^{3}$

Step-by-step explanation:

we know that

The volume of the rectangular prism is equal to

$V=BHL$

Convert the given dimensions to an improper fractions

$B=3\frac{1}{2}\ cm=\frac{3*2+1}{2}=\frac{7}{2}\ cm$

$H=1\frac{1}{2}\ cm=\frac{1*2+1}{2}=\frac{3}{2}\ cm$

$L=5\frac{1}{2}\ cm=\frac{5*2+1}{2}=\frac{11}{2}\ cm$

substitute in the formula

$V=(\frac{7}{2})(\frac{3}{2})(\frac{11}{2})=\frac{231}{8}\ cm^{3}$

Convert to mixed number

$\frac{231}{8}=\frac{224}{8}+\frac{7}{8}=28\frac{7}{8}\ cm^{3}$

7 0

3 years ago

Reagan solved 5.25 ÷ 5 and got 105. What did Reagan do wrong?

horrorfan [7]

Answer:

he forgot to put the decimal point

Step-by-step explanation:

answer is 1.05.

4 0

2 years ago

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An oarsman can row his boat 3 mph in still water. He sets out on the Illinois River, which flows at 5 mph. We are interested in

Artyom0805 [142]

Answer:

The speed from the observer is 8 mph.

Step-by-step explanation:

When the boat is going downstream with full force, its speed will be the one the oarsman can row on still water added by the flow of the river. In this case he can row the boat at speed of 3 mph, while the stream is 5 mph, so the speed from the observer standpoint is:

$speed = 3 + 5\\speed = 8 \text{ mph}$

The speed from the observer is 8 mph.

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3 years ago

1. Solve. r -7> 10 (1 point)<br> Ox>3<br> Or>7<br> O.x>17<br> Or> 70

Lelu [443]

Answer:

r > 17

Step-by-step explanation:

r -7> 10

Add 7 to each side

r-7+7 > 10+7

r > 17

6 0

3 years ago

Plz help answer fast

spayn [35]

Answer:

d because it does not looks somlar

5 0

2 years ago

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