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3 years ago

Hey guys please help me and try to show ur work

Mathematics

1 answer:

Mamont248 [21]3 years ago

6 0

This is the net of a rectangular prism, so the surface area can be found with the formula: SA=2lw+2wh+2lh

In this case,

l=10.5
w=6.4
h=4

Now, we can plug these numbers into the equation:

SA= (2)(10.5)(6.4) + (2)(6.4)(4) + (2)(10.5)(4)
SA= 134.4 + 51.2 + 84
SA = 269.6 cm

Therefore, the answer is D.

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A total has a number of meeting rooms , m available for events. Each meeting room has 325 chairs. Write an equation to represent

Andreyy89

Literally a question similar to the one before.

c=m*325, so if m=7:

-> c = 7 * 325
=> c = 2275 chairs

6 0

3 years ago

At a pep rally 14 out of 20 students who entered the gym were carrying a backpack. Based on this information, if 1,400 students

kondaur [170]

Answer:

980 students

Step-by-step explanation:

14/20=x/1400

cross multiplication and then u get the equatiton 20x=19600

solve and get 980

4 0

3 years ago

Read 2 more answers

You are most likely to encounter an irrational numbers when you’re

MArishka [77]

Answer:

Taking square-root of numbers

Step-by-step explanation:

The reason is that the square-root of most numbers is an irrational number because the answer we have can not be written as p/q form. For example, if we take the example of √2 then the answer we have is "1.4142135623730950..." which can not be written in p/q form. Hence taking square-root of numbers will most likely give an irrational number.

4 0

3 years ago

g The proportion of U.S. births that result in a birth defect is approximately 1/33 according to the Centers for Disease Control

Rudiy27

Answer:

0.1426 = 14.26% probability that at least one of the births results in a defect.

Step-by-step explanation:

For each birth, there are only two possible outcomes. Either it results in a defect, or it does not. The probability that a birth results in a defect is independent of any other birth. This means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

The proportion of U.S. births that result in a birth defect is approximately 1/33 according to the Centers for Disease Control and Prevention (CDC).

This means that $p = \frac{1}{33}$

A local hospital randomly selects five births.

This means that $n = 5$

What is the probability that at least one of the births results in a defect?

This is:

$P(X \geq 1) = 1 - P(X = 0)$

In which

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{5,0}.(\frac{1}{33})^{0}.(\frac{32}{33})^{5} = 0.8574$

$P(X \geq 1) = 1 - P(X = 0) = 1 - 0.8574 = 0.1426$

0.1426 = 14.26% probability that at least one of the births results in a defect.

4 0

3 years ago

What is the value of this expression when a=3 and b=-2?

navik [9.2K]

You can put the numbers where the variables are and do the arithmetic, or you can simplify the expression first. In the latter case, you have
(3a^(-2-(-1))b^(6-5)/2)^2 = (3a^(-1)b^1/2^2 = (3b/(2a))^2
= (3(-2)/(2(3)))^2 = (-1)^2 = 1

The value of the expression is 1.

4 0

3 years ago

Read 2 more answers