3 years ago

Which are simplified forms of the expression tan^2theta cos2theta?

Mathematics

1 answer:

kolbaska11 [484]3 years ago

4 0

Answer: The Answer is A and D I just took the test :)

Step-by-step explanation:

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3 years ago

During 30 minutes on the treadmill, LaToya burned 20 calories per minute. What is the rate of change of the function that repres

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4 years ago

Ellen said she spent half her money for lunch and half of what was left for a movie. She now has $1.20. How much did she spend f

goldenfox [79]

Answer: She spend $1.20 for lunch.

Step-by-step explanation:

Let the total amount be 'x'.

Half of her money spend for lunch be $\dfrac{x}{2}$

Half of her money left for a movie be $\dfrac{x}{2}$

Amount she has now = $1.20

So, According to question, it becomes ,

$\dfrac{x}{2}=1.20\\\\x=1.20\times 2\\\\x=\$2.40$

Hence, Amount she spend for lunch is $\dfrac{x}{2}=\dfrac{2.40}{2}=\$1.20$

Therefore, she spend $1.20 for lunch.

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3 years ago

A lightbulb is installed. With probability 1/3 , it burns out immediately when it is first installed. With probability 2/3 , it

Andrej [43]

Answer:

1 time unit

Step-by-step explanation:

There is a 1 in 3 chance that the time until the bulb burns out is zero, and a 2 in 3 chance that the time is the average between 0 and 3 (since it is uniformly distributed). Therefore, the expected value for the time until it burns is:

$E(x) = \frac{1}{3}*0+\frac{2}{3} *\frac{0+3}{2}\\ E(X) = 1$

The expected value of the time until the lightbulb burns out is 1 time unit.

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3 years ago

A spinner is spun 300 times.

vova2212 [387]

3000 times blue Sounders

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