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Liula [17]
3 years ago
9

Find a ⋅ b.

Mathematics
1 answer:
sashaice [31]3 years ago
4 0

Answer:

Step-by-step explanation:

a.b=5(4)+2(5)=20+10=30

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What is the volume of a hemisphere that
ch4aika [34]

<u>Given</u>:

Given that the diameter of the hemisphere is 12.6 cm

The radius of the hemisphere is given by

r=\frac{d}{2}=\frac{12.6}{2}=6.3

We need to determine the volume of the hemisphere.

<u>Volume of the hemisphere:</u>

Let us determine the volume of the hemisphere.

The volume of the hemisphere can be determined using the formula,

V=\frac{2}{3} \pi r^3

Substituting the values, r = 6.3 and π = 3.14, we have;

V=\frac{2}{3} (3.14)(6.3)^3

Simplifying the values, we have;

V=\frac{2}{3} (3.14)(250.047)

V=\frac{1570.29516}{3}

Dividing, we have;

V=523.43172

Rounding off to the nearest tenth, we get;

V=523.4

Thus, the volume of the hemisphere is 523.5 cm³

6 0
3 years ago
Do you guys know the answers to these?
frutty [35]

Answer:

The first one is 0 slope.

The second one undefined slope.

Step-by-step explanation:

I hope it helps you!!!:-)

7 0
3 years ago
1. ΔABC and ΔDEF are similar = Given
deff fn [24]
I think the answer is d. The slope of AC=Slope of DF.

Hope this helped☺☺
3 0
3 years ago
Read 2 more answers
A map has a scale of 3 cm and 20 cm which statement is true or false two cities are actually 66 cm part are9.9 cm part
victus00 [196]
Answer:
Answer options
A. Two cities that are 7.5 cm apart on the map are actually 50 km apart.
D. Two cities that are actually 66 km apart are 9.9 cm apart on the map.
Step-by-step explanation:
Step 1
Indicate the scale as shown;
3 cm : 20 km, meaning 3 cm on the map represents 20 km on the ground
A). what does 7.5 cm represent on the ground
Distance on ground=(7.5×20)/3=50 km
B). what does 4 cm represent on the ground
Distance on ground=(4×20)/3=26.67 km
C). what does 45 km on ground represent on the map
Distance on map=(45×3)/20=6.75 cm
D). what does 66 km on ground represent on the map
Distance on the map=(66×3)/20=9.9 cm
8 0
3 years ago
To the nearest hundredth, what is the length of 
kvv77 [185]
I took the test. Here's the right answer

8 0
4 years ago
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