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3 years ago

1.4=h/5 plz help me I’ll give brainliest

Mathematics

2 answers:

serious [3.7K]3 years ago

5 0

1.4=h/5
multiply both sides by 5
h=7

Luba_88 [7]3 years ago

3 0

Answer:

ℎ=7

(Hope this helps!! Btw, I am the first to answer.)

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If f(x) = x²+3x+1, what is f(x+2)?

stira [4]

Answer:

Step-by-step explanation:

f(x)=x^2+3x+1

f(x+2)=(x+2)^2+3(x+2)+1

f(x+2)=(x+2)(x+2)+3x+6+1

x^2+2x+2x+4+3x+7

x^2+4x+3x+11

x^2+7x+11

7 0

4 years ago

The radius of a sphere is increasing at a rate of 0.5 centimeters per minute. At a certain instant, the radius is 17 centimeters

Usimov [2.4K]

Using implicit differentiation, it is found that the rate of change of the volume of the sphere at that instant is of 1815.84 cubic centimetres per minute.

The volume of a <u>sphere of radius r</u> is given by:

$V = \frac{4\pi r^3}{3}$

Applying <u>implicit differentiation</u>, the rate of change is of:

$\frac{dV}{dt} = 4\pi r^2\frac{dr}{dt}$

In this problem, we have that $\frac{dr}{dt} = 0.5, r = 17$ , thus:

$\frac{dV}{dt} = 4\pi (17)^2(0.5) = 1815.84$

The rate of change of the volume of the sphere at that instant is of 1815.84 cubic centimetres per minute.

A similar problem is given at brainly.com/question/11496075

3 0

3 years ago

Please help!! For brainliest !!!!!!!!!

Leviafan [203]

Answer:

I believe that the answer is 0.395

6 0

3 years ago

If 3/10 = 30/100, then 4/10 = ___/100

ICE Princess25 [194]

Answer:

40/100

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Based on aâ poll, among adults who regret gettingâ tattoos, 18â% say that they were too young when they got their tattoos. Assum

Sergeeva-Olga [200]

Answer:

a) 20.44% probability that none of the selected adults say that they were too young to get tattoos.

b) 35.90% probability that exactly one of the selected adults says that he or she was too young to get tattoos.

c) 56.34% probability that the number of selected adults saying they were too young is 0 or 1.

d) No

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they say they were too young when they got their tattoos, or they don't say that. Each adult is independent of each other. So we use the binomial probability distribution 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.

18% say that they were too young when they got their tattoos.

This means that $p = 0.18$

Eight adults who regret getting tattoos are randomly selected

This means that $n = 8$

a. Find the probability that none of the selected adults say that they were too young to get tattoos.

This is P(X = 0).

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

$P(X = 0) = C_{8,0}.(0.18)^{0}.(0.82)^{8} = 0.2044$

20.44% probability that none of the selected adults say that they were too young to get tattoos.

b. Find the probability that exactly one of the selected adults says that he or she was too young to get tattoos.

This is P(X = 1).

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

$P(X = 1) = C_{8,1}.(0.18)^{1}.(0.82)^{7} = 0.3590$

35.90% probability that exactly one of the selected adults says that he or she was too young to get tattoos.

c. Find the probability that the number of selected adults saying they were too young is 0 or 1.

Either a. or b.

20.44 + 35.90 = 56.34

56.34% probability that the number of selected adults saying they were too young is 0 or 1.

d. It we randomly select 9 adults. Is 1 a significantly low number who day that they were too young to get tattoos?

Now $n = 9$

It is significantly low if it is more than 2.5 standard deviations below the mean.

The mean is $E(X) = np = 9*0.18 = 1.62$

The standard deviation is $\sqrt{V(X)} = \sqrt{n*p*(1-p)} = \sqrt{9*0.18*0.82} = 1.15$

1 > (1.62 - 2.5*1.15)

So the answer is no.

5 0

3 years ago