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Hatshy [7]
3 years ago
6

Jhon can solve 6 math problems in 20 minutes while another student, Juaqine, can solve the same 6 math problems at a rate of 1 p

roblem per 4 minutes. Who is faster?
Mathematics
1 answer:
ASHA 777 [7]3 years ago
3 0

Answer:

  Jhon

Step-by-step explanation:

At the rate of 4 minutes per problem, it take Juaqine ...

  (4 min/prob)×(6 prob) = 24 min

to solve the problems.

That is more time than it takes Jhon, so Jhon is faster.

You might be interested in
Ruben and Tariq have 245.5 downloaded minutes of
Strike441 [17]

Answer:

113.5

Step-by-step explanation:

R+T= 245.5

R=132

245.5-R=T

245.5-132=113.5

T=113.5

8 0
2 years ago
Read 2 more answers
A used car dealer sells SUVs and cars. Of all the vehicles, 90% are cars. Of all the vehicles 40% are red cars. What is the prob
AleksAgata [21]

Answer:

44.4%

Step-by-step explanation:

To calculate this, we proceed as follows.

we use the probability equation below;

P(A|B) = P(A and B) / P(B)

Applying the above to the scenario at hand;

P(red | car) = P(red and car) / P(car)

P(red and car) = 40% or simply 40/100 = 0.4

P(car) = 90% = 90/100 = 0.9

P(red | car) = 0.4/0.9

P(red | car) = 0.4444 which is = 44.44% ; to the nearest tenth of a percent = 44.4%

4 0
3 years ago
A simple random sample of 60 items resulted in a sample mean of 65. The population standard deviation is 14. a. Compute the 95%
bazaltina [42]

Answer:

The 95% confidence interval for the population mean is between 61.5 and 68.5.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.96*\frac{14}{\sqrt{60}} = 3.5

The lower end of the interval is the sample mean subtracted by M. So it is 65 - 3.5 = 61.5

The upper end of the interval is the sample mean added to M. So it is 65 + 3.5 = 68.5

The 95% confidence interval for the population mean is between 61.5 and 68.5.

6 0
2 years ago
Read 2 more answers
Help me solve this please
igomit [66]
The key word here is *square* in "square flower garden". 

So we need to find the area of the flower garden, and subtract it from the overall area of the yard. The remainder will be how much grass covers the yard.

Area of the Square flower garden:
 7.5 * 7.5 = 56.25

Area of the Entire yard:
25 * 18 = 450

450 - 56.25 = 393.75 square feet of grass
6 0
3 years ago
thomas argues that rational 27 divided by rational 3 is rational. mateo argues that the quotient between rational 27 and rationa
vitfil [10]

Answer:

Rational

Step-by-step explanation:

A number that cannot be expressed that way is irrational. For example, one third in decimal form is 0.33333333333333 (the threes go on forever). However, one third can be express as 1 divided by 3, and since 1 and 3 are both integers, one third is a rational number.

8 0
3 years ago
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