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
Art [367]
3 years ago
10

Please help me in number 3please!

Mathematics
1 answer:
satela [25.4K]3 years ago
4 0

For the circumference, you actually multiply by 20 because of the formula πd = C [OR 2πr = C]. You meant to double the radius.

You might be interested in
PLEASE HELP ASAP, I WILL GIVE BRAINLESSLY ANSWER <br> SHOW WORK PLEASE
zhannawk [14.2K]

Answer:

C. N(t)=150\cdot 3^t

Step-by-step explanation:

You are given the exponential function n(t)=ab^t.

From the table, N(t)=150 at t=0, thus

N(0)=a\cdot b^0\\ \\150=a\cdot 1\ [\text{ because }b^0=1]

Also N(t)=450 at t=1, thus

N(1)=a\cdot b^1=a\cdot b.

Since  a=150, substitute it into the second equation

450=150\cdot b\\ \\b=\dfrac{450}{150}\\ \\b=3

and the expression for the exponential function is

N(t)=150\cdot 3^t

5 0
3 years ago
A data set includes 103 body temperatures of healthy adult humans having a mean of 98.9degreesf and a standard deviation of 0.67
trasher [3.6K]

Answer:

Step-by-step explanation:

Confidence interval is written in the form,

(Sample mean - margin of error, sample mean + margin of error)

The sample mean, x is the point estimate for the population mean.

Margin of error = z × s/√n

Where

s = sample standard deviation = 0.67

n = number of samples = 103

From the information given, the population standard deviation is unknown hence, we would use the t distribution to find the z score

In order to use the t distribution, we would determine the degree of freedom, df for the sample.

df = n - 1 = 103 - 1 = 102

Since confidence level = 99% = 0.99, α = 1 - CL = 1 – 0.99 = 0.01

α/2 = 0.01/2 = 0.005

the area to the right of z0.005 is 0.005 and the area to the left of z0.005 is 1 - 0.005 = 0.995

Looking at the t distribution table,

z = 2.6249

Margin of error = 2.6249 × 0.67/√103

= 0.173

Confidence interval = 98.6 ± 0.173

This suggests that the mean body temperature could very possibly be

98.6degrees°F.

3 0
3 years ago
The table below shows that 1 day equals 24 hours. Notice that 12 hours is one-half of that. Use the table to help you determine
djverab [1.8K]

Answer:

There are 1.25 days in 30 hours or 1 1/4 days in 30 hours

Step-by-step explanation:

As we know one day is 24 hours. So if we divide 30 hours by 24 hours (or one whole day) then we get 1.25 days or also known as 1 1/4 days

6 0
3 years ago
Which of the following statements about the graph of y=3/4x-1 are true?
Yuliya22 [10]
What are the statements?
4 0
2 years ago
An item is regularly priced at$90. Henry bought it on sale for 70% off the regular price. How much did Henry pay?
Neko [114]
70 times .9 is 63 so 90 minus 63 is27 so it was $27
3 0
3 years ago
Read 2 more answers
Other questions:
  • Random arm span and height of random people
    14·2 answers
  • Evaluate the algebraic expression: 7k - 4k when k= 6
    7·1 answer
  • I need to know how to get the answer
    13·1 answer
  • There are 12 inches in 1 foot and 5,280 feet in 1 mile. Elena ran miles.
    13·1 answer
  • Best answer gets brainliest
    5·1 answer
  • Simplify: 5(6-ab)+2(-7+3ab) =30-5ab -14 +6ab= 16+ab​
    11·1 answer
  • The number of deer in Georgia increased by 2,300 last year. Which of the situations below, when combined with that increase, wil
    13·1 answer
  • An adult takes 400 mg of ibuprofen. Two hours later, there is 201.6 mg of
    6·1 answer
  • Evaluate the expression shown below and write your answer as a fraction in simplest form.
    15·1 answer
  • (10 POINTS) CORRECT ONLY WRONG ANSWERS WILL BE REPORTED!!!!!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!