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Black_prince [1.1K]
3 years ago
9

The ratio of trucks to cars in a parking lot was 5 to 2. How many trucks were in the lot if there where 18 cars?

Mathematics
1 answer:
Elena L [17]3 years ago
6 0
90 trucks- for every 2 cars there are 5 trucks
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The combined math and verbal scores for females taking the SAT-I test are normally distributed with a mean of 998 and a standard
WARRIOR [948]

Answer: There is 64.8% of females do not satisfy that requirement.

Step-by-step explanation:

Since we have given that

Mean = 998

Standard deviation = 202

We need to find the percentage of females do not satisfy that requirement.

If a college includes a minimum score of 1025 among its requirements,

So, it becomes,

P(X

Hence, there is 64.8% of females do not satisfy that requirement.

3 0
3 years ago
There are 620 students and 31 teachers at the Turner Middle School.There are 950 students and 38 teachers at the Green Middle Sc
kicyunya [14]
We begin with the <span> Turner Middle School:
Ratio of students to teachers: </span>\frac{620}{31}
Green Middle School:
Ratio of students to teachers: \frac{950}{38}
Let check that we cannot form a proportion:
\frac{620}{31}=20\text{ and } \frac{950}{38}=25
The two ratios are not equals so we cannot form a proportion. 
Let x be the number of <span>teachers that Green have to hire in order to make the two ratios equal. We get the equation:
</span>\frac{950}{38+x}=\frac{620}{31}\text{ and we solve the equation like this:}\\38+x=\frac{950\times31}{620}=47.5 \text{ and then:}\\x=47.5-38=9.5

<span>The Green school need to hire 9 teachers. 

Part-to-whole ratio:
</span>Turner Middle School:
 \frac{620}{31+620}
Green Middle School:
\frac{950}{38+950}
8 0
3 years ago
Read 2 more answers
A pyramid has cross-sectional shapes, taken parallel to its base, that are ______ to one another.
Wewaii [24]

Answer:

D. similar

Step-by-step explanation:

similar but not congruent to one another.

3 0
3 years ago
The rainfall total two years ago was 10.2 inches. last year's total was 20%g greater. what was last year's rainfall total?
marishachu [46]
By your description, my answer is 10.2in x 20%= 20.808 inches of last years rain
3 0
3 years ago
According to a "how to stop bullying" Web site, 15% of students report experiencing bullying one to three times within the most
AlekseyPX

Answer:

His 95% confidence interval is (0.065, 0.155).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 186, \pi = 0.11

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.11 - 1.96\sqrt{\frac{0.11*0.89}{186}} = 0.065

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.11 + 1.96\sqrt{\frac{0.11*0.89}{186}} = 0.155

His 95% confidence interval is (0.065, 0.155).

4 0
3 years ago
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