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Phoenix [80]
3 years ago
5

Is 1/3 a rational number? can rational numbers be negative

Mathematics
1 answer:
Kisachek [45]3 years ago
3 0
1/3 is a rational number and rational number’s can be negative. explanation: a rational number is any number, positive or negative, that can be written as a fraction
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A car's speedometer has a percent error of 5%. The speedometer currently shows that the car is traveling at a speed of 60 mph.
Minchanka [31]

Answer:

The actual speed of the car is either 57 mph or 63 mph

Step-by-step explanation:

Given as :

The measured speed o the car = 60 mph

The percentage error in speedometer = 5 %

Let The actual speed of car = x mph

Now, percentage error = \dfrac{\textrm actual value - \textrm measured value}{\textrm measured value} × 100

So, \frac{5}{100} = \frac{x - 60}{60}

or,  \frac{5}{100} × 60 = x - 60

Or, 3 = x - 60

∴  x = 63 mph

Hence The actual speed of the car is either 57 mph or 63 mph . Answer

8 0
3 years ago
a car travels 54.9 miles in an hour. if the car continues at the same speed for 12hours,how many miles will it travel
Ilia_Sergeevich [38]
Here's what you have to do: multiply. 54.9×12= 658.8. So, he traveled 658.8 miles in twelve hours.
7 0
3 years ago
Rusty is 5.75 feet tall and casts a 7 foot shadow find the angle of elevation from the tip of the shadow to the top of Rusty’s h
11Alexandr11 [23.1K]

Answer:

Ф = 39.4 degrees

Step-by-step explanation:

The ratio 5.75 / 7 is the tangent of the angle of elevation.  Using the inverse tangent function on a calculator returns Ф = 39.4 degrees.

5 0
3 years ago
Find the​ P-value for the indicated hypothesis test with the given standardized test​ statistic, z. Decide whether to reject H0
Leviafan [203]

Answer: We do not reject the null hypothesis.

Step-by-step explanation:

  • When the p-value is greater than the significance level , then we do not reject the null hypothesis or if p-value is smaller than the significance level , then we reject the null hypothesis.

Given : Test statistic : z = -2.28

Significance level : \alpha=0.02

By using the standard normal distribution table ,

The p-value corresponds to the given test statistic ( two tailed ):-

2P(Z>|z|)=2P(Z>2.28)=0.0226

Since the p-value is greater than the significance level of 0.02.

Then , we do not reject the null hypothesis.

8 0
3 years ago
HELP ASAP. Determine whether triangles are similar by Side by Side (SSS), Side Angle Side (SAS), or Angle Angle (AA) similarity.
Nonamiya [84]
The answer and process are in the picture.

4 0
2 years ago
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