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
Vinil7 [7]
3 years ago
8

An ASB Robusta 300 TS sump pump can remove water from Martha's flooded basement in 70 min .The 1 Little Giant 1-A sump pump can

complete the same job in in 30 min. How long would it take the two pumps together to pump out the basement?
Mathematics
1 answer:
aleksandrvk [35]3 years ago
5 0
21 minutes. hope this helps.
You might be interested in
× + 3/ 2 = × + 8/ 7<br> Solve for x
Illusion [34]

Answer:

depending on the form of how your question is actually written .. The answer will either be :

x= -1

or

There are no values of x that make the equation true. No solution.

Step-by-step explanation:

Hope this helps

4 0
3 years ago
What is the zero of r(x)=8/3x-16
Art [367]
I think the answer is zero

I hope this helps
4 0
3 years ago
Read 2 more answers
For bone density scores that are normally distributed with a mean of 0 and a standard deviation of​ 1, find the percentage of sc
gogolik [260]

Answer:

a) The percentage of bone density scores that are significantly high is 2.28%

b) The percentage of bone density scores that are significantly low is 2.28%

c) The percentage of bone density scores that are not significant is 95.44%

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

a. significantly high​ (or at least 2 standard deviations above the​ mean).

This is 1 subtracted by the pvalue of Z = 2.

Z = 2 has a pvalue of 0.9772

1 - 0.9772 = 0.0228

2.28% of scores are signifcantly high

b. significantly low​ (or at least 2 standard deviations below the​ mean).

pvalue of Z = -2

Z = -2 has a pvalue of 0.0228

2.28% of scores are signicantly low.

c. not significant​ (or less than 2 standard deviations away from the​ mean).

pvalue of Z = 2 subtracted by the pvalue of Z = -2.

Z = 2 has a pvalue of 0.9772

Z = -2 has a pvalue of 0.0228

0.9772 - 0.0228 = 0.9544

95.44% of the scores are not significant

7 0
3 years ago
OAB is a sector of a circle of radius 12 cm Angle AOB= 60º Work out the length of the arc B. Give your answer in terms of pie.
Debora [2.8K]

Answer:

Since 60° is one sixth of the entire circle (360°) it means that the length of arc B is 1/6 th of the circumference.

1/6 * (12 * 2π) = 4π

3 0
3 years ago
Solve for x<br> 2/(7x) = 6/5<br><br> 5/21<br> -21/5<br> 21/5<br> I don't know<br> - 5/21
djverab [1.8K]
The answer is:  [A]:  " \frac{5}{21} " .
________________________________________
Given: 

2/ (7x) = 6/5; 

→  (6/5) * (7x) = 2 ; 

42x / 5 = 2 ; 

42x = 2*5 ; 

42x = 10 ; 

42x /42 = 10/42 ; 

x = 10/42 = (10÷2) / (42÷2) = 5/21 ; 

x = \frac{5}{21} ;

→  which is:  Answer choice:  [A]:  " \frac{5}{21} " .
__________________________________________________
7 0
3 years ago
Other questions:
  • I don’t understand how to solve 3.8+6(0.9) = 8.6
    15·1 answer
  • I need help with my math plz!!!
    14·1 answer
  • At Putt Putt, they offer a special for unlimited mini golf. You decide to go golfing with your friends. After golfing and purcha
    8·1 answer
  • Find the length of AB.<br> AB = [ ? ]in
    7·1 answer
  • find the percent increase. round to the nearest percent from 85 books to 134 books. the percent increase is *blank*
    5·1 answer
  • A regression analysis involving one independent variable and one dependent variable is referred to as
    6·1 answer
  • HELP PLEASE HELP EMERGENCY
    7·1 answer
  • Which equation represents the table
    8·1 answer
  • Not even going to say anything other than, help​
    9·1 answer
  • A similar scale model of a building is 12 in tall and 9 in wide. If the actual building is 100 ft tall, how wide is the building
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!