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Brut [27]
3 years ago
15

Is square root of 12 times the square root of 3 rational or irrational

Mathematics
1 answer:
TEA [102]3 years ago
7 0

Answer:

Irrational

Step-by-step explanation:

Square root if 12 is 3.464 and the square root of 3 is 1.732. You multiply 3.464 and 1.732 to get 5.99 which would be 6 if you round it up. The reason to why it's irrational is because 6 can not be written as a ratio of two integers, which means it cannot be expressed as a fraction.

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Elan Coil [88]
A collection of nickels and dimes is worth $4.40. There are 53 coins in all. How many nickels are there?

Nickel is a US coin worth 5 cents or 0.05.
Dime is a US coin worth 10 cents or 0.10

n + d = 53
0.05n + 0.10d = 4.40

n = 53 - d
0.05(53 - d) + 0.10d = 4.40  
2.65 - 0.05d + 0.10d = 4.40
0.05d = 4.40 - 2.65
0.05d = 1.75
d = 1.75 / 0.05
d = 35

n = 53 - d
n = 53 - 35
n = 18 

There are 18 nickels and 35 dimes.

0.05n + 0.10d = 4.40
0.05(18) + 0.10(35) = 4.40
0.90 + 3.5 = 4.40
4.40 = 4.40
4 0
3 years ago
Read 2 more answers
A rectangle is 25 feet long.Its area is 375 square feet. What is the width of the rectangle?
frosja888 [35]

To find the width, divide the area by the length.

Width = 375 / 25

Width = 15 feet.

6 0
3 years ago
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Find the lateral surface area of the figure.
Brut [27]

Surface area of the cylinder = 816.4 sq. ft.

Solution:

Height of the cylinder = 21 ft

Diameter of the cylinder = 10 ft

Radius of the cylinder = 10 ÷ 2 = 5 ft

Use the value of \pi = 3.14

Surface area of the cylinder = 2 \pi r h+2 \pi r^{2}

Substitute the given values in the surface area formula, we get

Surface area of the cylinder $=2\times3.14\times 5\times 21+2 \times3.14\times 5^2

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                                               =816.4 ft²

Hence the surface area of the cylinder is 816.4 sq. ft.

7 0
3 years ago
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If 2/3t-3=1, then what is t?
malfutka [58]

Answer:

t = 6

Step-by-step explanation:

I used a calculator lol

5 0
3 years ago
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Let X denote the amount of time a book on two-hour reserve is actually checked out, and suppose the cdf is the following.
goldfiish [28.3K]

Answer: a) 0.2500

b) 0.1875

c) 0.4375

d) 1.414

e) 0, x/2

f) 1.3333

g) 0.4714

h) 2

Step-by-step explanation: see attachment below

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3 years ago
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