1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Aleksandr-060686 [28]
3 years ago
12

a parabolic lamp is facing due east. The bulb (located at the focus) is 8 inches away from the vertex (located at the origin). t

he lamp has a diameter of 20 inches. Which is the depth of the dish?
Mathematics
1 answer:
True [87]3 years ago
7 0

9514 1404 393

Answer:

  3 1/8 inches

Step-by-step explanation:

For focus-vertex distance p, the equation of the parabola can be written ...

  y = x^2/(4p)

Here, we have p=8. We want to find the value of y when x=10 (the radius of the dish). That is ...

  y = (10^2)/(4·8) = 100/32 = 3 1/8

The dish is 3 1/8 inches deep.

You might be interested in
How many terms does the expression q÷2 +g-2k​
Eduardwww [97]

Answer:

3

Step-by-step explanation:

8 0
3 years ago
Help me with HW and i will give brainliest.
hammer [34]

Answer:

a b c and e

Step-by-step explanation:

hope it helped :3

7 0
3 years ago
Read 2 more answers
Cardiovascular disease is a major cause of death and illness worldwide, with high blood pressure and high LDL cholesterol both b
valkas [14]

Answer:

Null and alternative hypotheses:

H0: p1 = p2

H1: p1 ≠ p2

To find the sample proportions, we have the following:

p'1 = \frac{x_1}{n_1} = \frac{113}{3180} = 0.0355

p'2 = \frac{x_2}{n_2} = \frac{157}{3168} = 0.0495

p' = \frac{(x_1 + x_2}{n_1 + n_2} = \frac{113 + 157}{3180 + 3168} = 0.0425

Calculate Z statistics:

z = \frac{(p1 -p2)}{\sqrt{(p'(1-p')*(\frac{1}{n1}+ \frac{1}{n2})}}

= \frac{(0.0355 - 0.0495)}{\sqrt{(0.0425*(1-0.0425) * (\frac{1}{3180} + \frac{1}{3168})}} = -2.764

Z = -2.764

P-value = 0.00285

The pvalue is low.

Since the pvalue is low, reject null hypothesis, H0.

Conclusion:

There is strong evidence that patients experiencing the primary outcome is different for those receiving the treatment compared to those without

7 0
3 years ago
I think of a number double it, then reduce six. The result is 20. What is the number??
MissTica

Answer:

The number is 13

Step-by-step explanation:

the equation:

2x-6=20

The solution.

2x=20+6

x=\frac{26}{2} =13

Hope this helps

5 0
2 years ago
Best estimate of 48% of 159
olga55 [171]

Answer:

76.32

Step-by-step explanation:

Move the decimal point two times to the left 48. --> .48

Multiply .48 by 159

= 76.32

8 0
3 years ago
Other questions:
  • A train travels 226 miles from Washington, D.C.,to New York city in about 2 hours and 30 minute. What is the average speed of th
    15·1 answer
  • Recently 1 u.s. dollar was worth 0.68 euros if you exchanged $25 at that rate how many euros would you get
    14·1 answer
  • What additional information would prove that LMNP is a rectangle?
    7·2 answers
  • You asked one of your team members about the schedule variance (SV) for one of her key deliverables. She mentioned that she is b
    14·1 answer
  • Which equality represents the graph? Don't mind the answer that was already on there.
    8·1 answer
  • To rent a certain meeting room, a college charges a reservation fee of
    12·1 answer
  • What is the answer?
    5·2 answers
  • G(n) = -50 - 15n<br> Complete the recursive formula of g(n).<br> g(1) =<br> g(n) = g(n-1)+
    12·1 answer
  • Please help algebra II
    7·1 answer
  • Find the sum without using a number line<br> -6 1/3 + 3=
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!