All categories

3 years ago

The area of circle Z is 64 ft2.

Mathematics

2 answers:

Maru [420]3 years ago

8 0

Answer:

r=4.51 ft

Step-by-step explanation:

Area of a circle is given by

$A=\pi r^{2}$ where A is area and r is the radius. Making r the subject of the above formula then

$r=\sqrt {\frac {A}{\pi}}$

Substituting A with 64 then

$r=\sqrt {\frac {64}{\pi}}\approx 4.51 ft$

posledela3 years ago

3 0

Answer:

its 8

Step-by-step explanation:

i got it right

You might be interested in

Write an equation in point-slope form of the line that passes through the point (9,0) and has a slope of m=-3 .

aksik [14]

Answer:

$y = - 3x + 27$

Step-by-step explanation:

The standard form for the equation of the line is

$y = mx + c$

Recall that:

$y = 0 \: \: \: x = 9 \: \: \: m = - 3 \\ y = mx + c \\ 0 = - 3(9) + c \\ 0 = - 27+ c \\ 27 = c$

Therefore the equation of the line is:

$y = mx + c \\ y = - 3x + 27$

5 0

2 years ago

Suppose you do an analysis of the starting salaries of 100 recent Lehman graduates. You find that the average starting salary is

madreJ [45]

Answer:

a) (59180,60820)

b) (59020,60980)

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = $60,000

Standard Deviation, σ = $5,000

Sample size, n = 100

a) 90% critical values

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.10} = 1.64$

$60000 \pm 1.64(\frac{5000}{\sqrt{100}} ) = 60000 \pm 820 = (59180,60820)$

b) 95% critical values

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

$60000 \pm 1.96(\frac{5000}{\sqrt{100}} ) = 60000 \pm 980= (59020,60980)$

5 0

3 years ago

patsy's pizzeria sold 3 5/6 vegetables pizzas yesterday. they sold 3 times as many pepperoni pizzas. how many pepperoni pizzas d

dsp73

Answer:

11.5

Step-by-step explanation:

3 x 3 5/6

3 x 23/6

=69/6

=11.5

8 0

3 years ago

7x-3=4x+3 < Answer Please

USPshnik [31]

Answer:

2! Thank it if it was helpful :D

Step-by-step explanation:

7x-4x=3+3

3x=6

x=2

8 0

3 years ago

Read 2 more answers

The probability distribution histogram shows the number of days a book is checked out of a library. Find P(3 ≤ X < 12)

grin007 [14]

0.4 is your answer your welcome

4 0

3 years ago