2 years ago

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Mathematics

1 answer:

satela [25.4K]2 years ago

7 0

Answer:

8/12

Step-by-step explanation:

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Knowing that sin(60)=0.866, what is cos(30)

tatuchka [14]

Answer:

knowing that sin(60)=0.866, what is cos(30)

Step-by-step explanation:

Cos 30 = 8.66

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2 years ago

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azamat

Answer:

$254.5 m^2$

Step-by-step explanation:

Area of a Circle: $A=\pi r^2$

The r is the length of the radius of the circle

The radius of the shown circle is 9 m

$A=\pi 9^2$

$A=81\pi=254.469004941$

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2 years ago

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If Professor Wilson found that the test scores of his students had a variance of 4.4, what is the standard deviation? Type a num

malfutka [58]

Answer:

The standard deviation will be: 2.1

Step-by-step explanation:

We know that standard deviation is basically the square root of variance.

Using the formula to calculate the standard deviation

$s=\sqrt{s^2}$

The variance = s² = 4.4

so the standard deviation can be calculated as:

standard deviation $=\sqrt{s^2}$

$=\sqrt{\left(4.4\right)^}$

$=2.1$

Therefore, the standard deviation will be: 2.1

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2 years ago

A turtle walks 12 feet in one hour. How many inches does the turtle walk in one hour?

blagie [28]

144 inches. 12 feet in one hour
12 inches per feet

12feet x 12 inches per foot= 144 inches

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2 years ago

What is the sum of the complex number 2+3i and 4+8i, where i=√-1?

ser-zykov [4K]

2+3i+4+8i
2+4+3i+8i
6+11i

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2 years ago

HELPPP ASAP!!!!!!! PLZZZ​

HELPPP ASAP!!!!!!! PLZZZ