1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Drupady [299]
3 years ago
7

A countertop is in the shape of a trapezoid. The lengths of the bases are 70.5 and 65.5 inches long. The area of the countertop

is 1224 square inches. Write and solve and equation to find the height of the countertop.
Mathematics
1 answer:
nikklg [1K]3 years ago
4 0
I don't know sorry, I'm just doing this to get myself some more points meng...
You might be interested in
P(X< ) 1-P(X> ) A softball pitcher has a 0.626 probability of throwing a strike for each curve ball pitch. If the softball
Mashutka [201]

Answer:

19.49% probability that no more than 16 of them are strikes

Step-by-step explanation:

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

Normal probability distribution

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

When we are approximating a binomial distribution to a normal one, we have that \mu = E(X), \sigma = \sqrt{V(X)}.

In this problem, we have that:

n = 30, p = 0.626

So

\mu = E(X) = np = 30*0.626 = 18.78

\sigma = \sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{30*0.626*0.374} = 2.65

What is the probability that no more than 16 of them are strikes?

Using continuity correction, this is P(X \leq 16 + 0.5) = P(X \leq 16.5), which is the pvalue of Z when X = 16.5. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{16.5 - 18.78}{2.65}

Z = -0.86

Z = -0.86 has a pvalue of 0.1949

19.49% probability that no more than 16 of them are strikes

7 0
3 years ago
............……Ayuda porfis
Bezzdna [24]

Answer:

Ok

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Write each equation in slope intercept form the graph
Makovka662 [10]

I believe the answer is 4/5x +2. Sorry if I’m wrong.

8 0
3 years ago
If angle P measures 50 degrees, what is the measure of angle Q?
dolphi86 [110]

Answer:

130 degrees

Step-by-step explanation:

Since angles P and Q are supplementary (meaning that they add up to 180), we can set up the equation:

180 = 50 + Q

Q = 130

3 0
2 years ago
Read 2 more answers
A circular mirror has a diameter of 12 inches. And a circular frame that is 3 inches wide surrounds the mirror. What is the comb
Lapatulllka [165]

Answer:

254.5 in.^2

Step-by-step explanation:

diameter of mirror = 12 in.

radius of mirror = diameter/2 = 13 in. / 2 = 6 in.

frame width = 3 in.

radius if combined mirror and frame = 6 in. + 3 in. = 9 in.

A = (pi)(r^2)

A = 3.14159 * (9 in.)^2

A = 3.14159 * 81 in.^2

A = 254.5 in.^2

8 0
2 years ago
Other questions:
  • What is <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br> 2/3(3x+9)=−2(2x+6)
    13·1 answer
  • Use the Pythagorean theorem to find the unknown side of the right<br>triangle​
    7·1 answer
  • Sam borrows money from his brother to buy a new video game. He agrees to pay his brother back the full amount of the loan, plus
    8·1 answer
  • Which table represents a linear function?​
    11·1 answer
  • Inspect the mathematical expression. 15 times 1/x - 3x
    10·1 answer
  • A field bordering a straight stream is to be enclosed. The side bordering the stream is not to be fenced. If 1000 yards of fenci
    6·1 answer
  • Help anyone please<br><br><br> Giving out brainliest
    7·2 answers
  • Pls help, I'll make the brainliest person the first to answer pls
    14·2 answers
  • Actually help... if u dont hve the answer, dont respond.
    8·2 answers
  • Lamonte has 50 m of fencing to build a three-sided fence around a rectangular plot of land that sits on a riverbank. (The fourth
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!