07/22/19

Please help me with this statistics question

A survey showed that 76​% of adults need correction​ (eyeglasses, contacts,​ surgery, etc.) for their eyesight. If 19 adults are randomly​ selected, find the probability that no more than... more
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07/22/19

A bottle of medication contains 16 ml, which is 20% less than a syringe containing the same medication. How much does the syringe contain?
18.0ml18.2ml19.2ml20.0ml
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06/08/19

cos(a-b)cos(b)-sin(a-b)sin(b)
i dont have the greek symbols but what would this be simplified using only one expression???
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06/07/19

Solving a work problem using a rational equation

For a certain bathtub, it takes the hot water faucet 3 times as long to fill the tub as it does the cold water faucet. Left on together, the two faucets take 6 minutes to fill the tub. How long... more
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05/26/19

Find the orthocenter for the triangle described by each set of vertices. K (4, −4), L (2, 2), M (5, −4) The coordinates of the orthocenter are?
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08/08/16

If 500 fuses are produced each day, how many can we expect to find each day that are defective ?
Consider the following binomial experiment: The probability that a fuse produced by a certain company will be defective is 37⁄100.
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08/08/16

If there are 10,300 people in this community, what is the standard deviation of the number of people who suffer from insomnia?
Consider the following binomial experiment: A study in a certain community showed that 9% of the people suffer from insomnia.
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08/08/16

What is the sample portion?
A politician claims that the majority of americans approve of a public health care option.  A survey of 500 randomly selected adults found that 346 approve of a public health care option. 
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08/04/16

Product of X and y
If X+y=7 and X-y=9, find the product of x and y.
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07/25/16

One integer is 8 less than another integer. The product of the lesser integer and -5 and 28 more than the greater integer. What are the integers?
One integer is 8 less than another integer. The product of the lesser integer and -5 and 28 more than the greater integer. What are the integers?
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07/11/16

factor the trinomial x^2+ 16x + 7
need help with this
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07/08/16

7 hours 8 9.4
Greg drove at a constant speed in a rainstorm for 250miles. He took a? break, and the rain stopped He then drove 112 miles at a speed that was 6miles per hour faster than his previous speed. If he... more
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06/22/16

(1/tan x) + (tan x)= (1/ sin x cos x)
I am to prove this identity to be correct. And I don't know what side to begin with...since I started with the left and made tan into sin/cos.  
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06/22/16

im not sure how to do this question
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.933 g and a standard deviation of 0.308 g. Find the probability of randomly selecting a cigarette... more
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06/22/16

Polynomial
On a map, Detroit, Michigan, Ann Arbour, Michigan and Toledo, Ohio form the vertices of a right triangle. The distance between Ann Arbour and Toledo is 11 miles more than distance between Ann... more
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06/22/16

How many arrangements of five letters from the word certain contain the letter T?
How many arrangements of five letters from the word certain contain the letter T?  
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06/21/16

mathematics data
a committee of six people is formed to investigate connections between business and the education system. it consists of people chosen from 5 students, 8 teachers, 5 principles, 10 parents, 4... more
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06/21/16

math help!
Nick has been looking for a new car. He decides to buy a small SUV for $35 000. It is known that the SUV will depreciate by 20% of its current value every year.a) Write an equation to relate the... more
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06/07/16

what is the distance from the top of this 732 ft building to the horizon to the nearest mile? (5280 ft=1 mi; radius of eath=4000 mi)
what is the distance from the top of this 732 ft building to the horizon to the nearest mile? (5280 ft=1 mi; radius of eath=4000 mi)
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06/07/16

Algebra one
A fountain on a lake sprays water in a parabolic arch modeled by the equation y = -0.3x^2 + 3x. A beam of light modeled by the equation -2x + 5.5y = 19.5 passes through the fountain to create a... more
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06/06/16

Which one is the cheapest?
The total area of the pool is 9000 + 4500 The floor and the walls of the swimming pool need to be covered with tiles. Decide which of the following companies would be the cheapest:“Everlasting... more
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06/06/16

the following function gives the U.S population t years after 1800. In what year will the population reach 144.7 million people? P(t)=189.4/1+34.74e^-0.031476t
I am unsure on where I am suppose to pluggin the numbers.  For instance I think that I should take 2016-1801 to obtain the number of years and plug my answer to P(t).  However the 144.7 million I... more
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06/03/16

How do you evaluate this logarithm?
loga48 - loga3/loga2   Can you please provide working out and an explanation? 
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06/03/16

y varies inversely
If y varies inversely with the square of? x, and y=14when x=5 find y when x=0.2
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05/24/16

Cali owns a campground, and has installed a rectangular swimming pool measuring 10m by 20m. She wants to put a wooden deck with a uniform width around the swimm
Cali owns a campground, and has installed a rectangular swimming pool measuring 10m by 20m. She wants to put a wooden deck with a uniform width around the swimming pool. Cali budgeted $1920 to... more
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