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
Kitty [74]
4 years ago
7

Ella can complete the cheep cheep beatch course in 1 minute and 25 seconds. If the course is 3 laps long. How long would it take

her to race 2 laps? ( proportion)
Mathematics
1 answer:
Minchanka [31]4 years ago
7 0

Answer: it will take her 56.67 seconds or 0.945 minutes to race 2 laps

Step-by-step explanation:

It takes Ella 1 minute and 25 seconds to complete the cheep beach course.

We can express this time in seconds or minutes. Expressing it in seconds,

1 minute = 60 seconds

Therefore,

1 minute and 25 seconds = 60 +25 = 85 seconds

If the course is 3 laps long, that means she completed 3 laps in 85 seconds. The time it will take her to race 2 laps would be

(2 × 85)/3

= 56.67 seconds

Converting to minutes, it will be

56.7/60 = 0.945 minutes

You might be interested in
Pls help me solve this problem
Ivanshal [37]

Answer:I think x is 43 not sure tho

Step-by-step explanation:

4 0
3 years ago
What does complumentary mean in geometry?
Bumek [7]
If you have a right triangle and one angle in the triangle is 45 degrees, the other would have to be complementary (an angle that adds up to another to form a right angle) so the other angle would have to be 45 degrees to make that a right angle 90 degrees. So complementary angles are two angles that add up to equal 90 degrees.
8 0
4 years ago
Current research indicates that the distribution of the life expectancies of a certain protozoan is normal with a mean of 48 day
irina1246 [14]

Answer:

P ( x_bar ≥ 51 ) = 0.0432

Step-by-step explanation:

Solution:-

- The random variable "X" denotes:

                  X : life expectancies of a certain protozoan

- The variable "X" follows normal distribution.

                  X ~ Norm ( 48 , 10.5^2 )

- A sample of n = 36 days was taken.

- The sample is also modeled to be normally distributed:

                  x ~ Norm ( 48 , ( 10.5 / √n)^2 )

- The sample standard deviation s = 10.5 / √n = 10.5 / √36

                                                      s = 1.75

- We are to investigate the the probability of sample mean x_bar ≥ 51 days:

                 P ( x_bar ≥ 51 )

- Standardize the results, evaluate Z-score:

                 P ( Z ≥ ( x_bar - u ) / s ) =  P ( Z ≥ ( 51 - 48 ) / 1.75 )

                 P ( Z ≥ 1.7142 ).

- Use the standardized normal table and evaluate:

                 P ( Z ≥ 1.7142 ) = 0.0432                  

Hence,      P ( x_bar ≥ 51 ) = 0.0432

5 0
3 years ago
(06.04 MC) Dennis drew the line of best fit on the scatter plot shown below: What is the approximate equation of this line of be
elena-14-01-66 [18.8K]

Answer:

Step-by-step explanation:

In order to write the equation of this line, we need to pick 2 points on the graph where the line goes right through the intersection of the grids. Actually, you only need 1 of these, because the line goes through at (0, 15). Another point then can be (6, 6). Locate this point so you know what I means when I say that the line goes right through where the grids intersect at x = 6 and y = 6 (as opposed to somewhere in the middle of one of these grids). Find the slope between these 2 points:

m=\frac{6-15}{6-0}=-\frac{9}{6}=-\frac{3}{2}

Since there's only one choice with that slope, that is the choice you want.

5 0
3 years ago
Adam earned 2 points in the first round of competition. In the second round, he earned 7 points. In the final round, he earned 9
Softa [21]
He earned 18 points in all
6 0
3 years ago
Other questions:
  • Santa has lots of mixed up socks in his sack! If he has 6 green socks, 4 gold socks, 8 black socks and 2 red socks, what is the
    10·1 answer
  • a number cube is labeled 1 to 6 .richard will roll the number cube 500 times and record the results.ABout how many times could r
    11·1 answer
  • A parabola opening up or down has vertex (3,-4) and passes through (-4,33/4).write it’s equation in vertex form
    6·1 answer
  • Please help please help please help and explain step by step​
    11·1 answer
  • Nancy started with 5 2/3 cups of flour. She used 2 1/3 cups of flour to make cookies. How much does she have left? *
    11·1 answer
  • You have 3 snacks and you give away 1 how many do you have left
    7·2 answers
  • To avoid the problem of having access to tables of the F distribution with values for the lower tail when a one-tailed test is r
    11·1 answer
  • Experimental Probability is ___________ .<br> a . our prediction <br> b. data from our experiment
    15·2 answers
  • How do you find the slope and y-intersept?
    5·2 answers
  • During his winter vacation, George reunited skis and boots for 5 days from the slope slayer ski shop. The shop charges the same
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!