Which expression is equivalent to 8-(-8)

Mathematics

2 answers:

Aloiza [94]4 years ago

8 0

What are the answer choices

Ierofanga [76]4 years ago

4 0

Answer:

Step-by-step explanation:

$8 - ( - 8) = 8 + 8 = 16$

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A clown is juggling at a circus. The path of the ball is given by the parametric equations x=2 cos t+2 and y=3 sin t+3. In what

Masja [62]

We need to find the direction the ball is moving, so wee have this parametric equation, namely:

$\left \{ {{x=2cost+2} \atop {y=3sint+3}} \right.$

The graph of this equation is given in figure below. So, we well substitute some values of t in the equation:

If t = 0
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x = 1.16 and y = 5.72
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A rectangular prism has a length of 1 1/2 m, a width of 3 m, and a height of 5 1/2 m. Enter the volume of the prism as a mixed n

san4es73 [151]

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3 years ago

The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the e

irakobra [83]

Answer:

We need a sample size of at least 383.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

85% confidence level

So $\alpha = 0.15$ , z is the value of Z that has a pvalue of $1 - \frac{0.15}{2} = 0.925$ , so $Z = 1.44$ .

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We need a sample size of at least n.

n is found with $M = 0.03, \pi = 0.21$