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3 years ago

PLS HELP ME ON THIS QUESTION I WILL MARK YOU AS BRAINLIEST IF YOU KNOW THE ANSWER!!

Mathematics

2 answers:

Ilia_Sergeevich [38]3 years ago

6 0

The correct answer is A

jonny [76]3 years ago

4 0

Answer:

I believe it is A. 1,1150.6cm^3

Step-by-step explanation:

To solve for the volume of a cone:

$V = \pi radius^{2} \frac{height}{3}$

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What is the value of f(x)= 9^x when x=-2?<br> A) 1/8<br> B) 81<br> C) 1/18<br> D) 18

lions [1.4K]

Substitute -2 in for x and get (9)^-2
Flip the equation so that the exponent is positive and get 1/9^2
Work it out 1/(9*9) = 1/81

4 0

3 years ago

Suppose that the height, in inches, of a 25-year-old man is a normal random variable with parameters = 71 and 2 = 6:25. What per

Alexus [3.1K]

Answer:

2.28%

Step-by-step explanation:

given that the height, in inches, of a 25-year-old man is a normal random variable with parameters = 71 and variance = 6:25.

If X is the height of 25 year old man then X is N(71, 2.5)

a) Probability of men in the 6-footer club are over 6 feet, 5 inches

= $P(X>6'5")\\=P(X>77")\\= P(Z>\frac{77-72}{2.5} \\=P(X>2)$

= 0.0228

percentage of men in the 6-footer club are over 6 feet, 5 inches

100 times prob

=2.28%

2.28% of men in the 6-footer club are over 6 feet, 5 inches willbe taller than 6 feet and 5 inches

5 0

3 years ago

What’s the area of a trapezoid?

S_A_V [24]

Answer:

For a trapezoid, A = (a+b/2)h

Step-by-step explanation:

I attached a picture which is better.

6 0

3 years ago

The height of a radio tower is 650 feet, and the ground on one side of the tower slopes upward at an angle of 10°.

Leni [432]

Answer with Step-by-step explanation:

We are given that

Height of radio tower =650 ft

From figure

AB=650 ft

BC=180 ft

We have to find the AC.

Using cosine law:

$c=\sqrt{a^2+b^2-2ab cos\alpha}$

$AC=\sqrt{(650)^2+(180)^2-2\times 650\times 180\times cos 80^{\circ}}$

$c=643.64 ft$

Hence, a guy required 643.64 ft wire when it is to connect to the tower and be secured at a point on the sloped side 180 ft from the base of the tower.

b.In a right triangle ABC, AB= $\frac{650}{2}=325 ft$

Pythagorous theorem : $(Hypotensuse)^2=(perpendicular\;side)^2+(base)^2$

Substitute the values

$(AC)^2=(AB)^2+(BC)^2$

$(AC)=\sqrt{(325)^2+(180)^2}$

$AC=371.52 ft$

Hence, the length of wire should be 371.52 ft when a second guy connect the middle of the tower and be secured at a point 180 ft from the base on the flat side by wire.

4 0

3 years ago

a owner increases the rent office house by 5% at end of each year if current its rent is ₹2500pm how much will be the rent after

sergeinik [125]

Answer:

2950$

Step-by-step explanation:

2500×5%=125$

125×2=250$

2500+250=3960$

5 0

2 years ago