3 years ago

Simplify the expression by using a double-angle formula. −2cos2π91

Mathematics

1 answer:

Hatshy [7]3 years ago

7 0

The Answer of −2cos2π91 = is -2

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A plant grew 1/8 in in the first week of the month and 5/8 in the rest of the month how much did the plant grow for the entire m

Ann [662]

6/8 , just add both fractions together for the total, as they already have common denominators.

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2 years ago

Find the volume of each cylinder. 1. Radius = 3 cm, Height = 6 cm

Licemer1 [7]

Answer:

169.56 cubic centimeters

Step-by-step explanation:

volume(cylinder) = $\pi$ $r^{2}$ $h$

(3.14)(3^2)(6)

(3.14)(9)(6)

169.56

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3 years ago

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2 years ago

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A presidential candidate plans to begin her campaign by visiting the capitals in 44 of 4343 states. what is the probability that

QveST [7]

If the 4 states have to be in a specific order say ABCD, then the total number of different possible routes is:

43P4 = 2,961,840

So the probability is:

1 / 2,961,840 = 3.38 x 10^-7

But if the 4 states can be in any order such as DBAC, ACBD etc, then the total number of different possible routes is:

43C4 = 123,410

So the probability is:

1 / 123,410 = 8.1 x 10^-6

No I don’t think it is practical to list all the different possible routes to select the one that is best. We can simply use mathematical models to solve for that one.

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2 years ago

What is the area of this figure? Use 3.14 for TT. Please help

german

Answer:

406.08

Step-by-step explanation:

First FInd the area of the rectangle : which is short side * long side

-> 15*12=180m

Then find the area of the half circle, the formula of the area of a circle is $\pi r^2$

here it's half a circle so it's $\frac{\pi r^2}{2}$ where r is 12

-> $3.14\cdot \frac{\left(12\right)^2}{2}=226.08 m$

Finally just add the area of the rectangle with the area of the half circle

-> $180+226.08=406.08 m$

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1 year ago