answer.
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
Vesna [10]
2 years ago
7

A convex lens has a diameter of 30 mm and a depth of 5 mm at the center. How far from the vertex is the focus?

Mathematics
1 answer:
natima [27]2 years ago
8 0
The formula for determining the distance of the focus from the vertex is as follows,

     f = x² / 4a

where f is focus, x is the radius (half the value of diameter), and a is the depth. Substituting the known values to the given equation,

   f = (30/2 mm)² / (4)(5 mm)

    f = 11.25 mm

<em>ANSWER: 11.25 mm</em>
You might be interested in
7700 dollars is placed in an account with an annual interest rate of 5.75%. How much will be in the account after 24 years, to t
Amanda [17]

Answer:

A = $18,326.00

(assuming simple interest)

Step-by-step explanation:

Assuming simple interest, the following formula applies:

final amount = (principal amount) x [1  + (annual rate)(time elapsed) ]

or

A = P (1 + rt)

in our case,

P = $7,700

r = 5.75% = 0.0575

t = 24 years

hence,

A = 7700 [ 1 + (0.0575)(24)]

A = 7700 ( 1 + 1.38)

A = 7700 x 2.38

A = $18,326.00  

4 0
2 years ago
Sarah and her friends are going blueberry picking. Sarah picks $b$ blueberries. Michael picks $3$ more than half as many as Sara
yKpoI14uk [10]
The correct answer is b=3+1/2 divided by 5+3 after that +10-3*5*3 . add the answers up and thats the solution
6 0
2 years ago
You roll a colored cube with one white side, two red sides, and three blue sides. What is the expected number of red sides you w
miskamm [114]

Hello!

This is an example of theoretical probability. If you rolled the die 1,000 times, you would probably roll red about 333 times. On average, this is 1/3, and with a die it is 2/6. As you can see, it will be rolled 2/6 of the time on average, so our answer is A) 2.

I hope this helps!

3 0
2 years ago
Read 2 more answers
The table shows the dimensions and the numbers of blades of grass on four rectangular pieces of sod. Select and drag the pieces
sveta [45]

Answer:

i think it is d,a,c,b

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Today is the Harperville Fall for Fun festival, and Naomi is volunteering at the balloon stand. When she practiced last night, N
adelina 88 [10]

Answer:30

Step-by-step explanate

8 0
2 years ago
Other questions:
  • How are the values of the eights related in 880?
    5·1 answer
  • Rachel, Nancy, and Diego were in fishing competition. Rachel's fish was 7/8 foot long, Nancy's fish was 1/4 foot long, and Diego
    15·1 answer
  • today Ian wants to run less than 7/12 miles write a fraction with a denominator of 4 to represent a distance that is less than 7
    7·2 answers
  • on a map with a scale 1:100,000 the distance between two cities is 12cm. what would be the distance between these two cities on
    8·2 answers
  • Derrick needs to figure out how he’s doing on his test scores so far this year. You can help by calculating the mean and the med
    15·2 answers
  • Wanahton is cooking a breadstick on a rectangular baking sheet measuring 9\dfrac129
    12·1 answer
  • A sequence is defined by the recursive formula f(n + 1) = 1.5f(n). Which sequence could be generated using the formula? –12, –18
    10·1 answer
  • PLZZZZZZZ HELP ASAP Figure JKL is reflected about the y-axis to obtain figure J’K’L’: A coordinate plane is shown. Triangle JKL
    11·2 answers
  • Help please!!!! real answers please need it in 1 hour.
    12·2 answers
  • The BJ Electrical Company needs to hire master electricians and apprentices for a one week project. Master electricians receive
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!