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shutvik
2 months ago
8

In triangle $abc$, $m\angle a = 90^\circ$, $m\angle b = 75^\circ$, and $bc = \sqrt {3}$ units. what is the area of triangle $abc

$? express your answer as a common fraction. your answer submittips give up
Mathematics
1 answer:
Inessa [12.5K]2 months ago
3 0
Given the specified angles, one is 90 degrees, indicating that the triangle is a right triangle. With provided angles and one side representing the hypotenuse (the longest side), the area is determined using the formula: Area = 1/2 * base * height. Let's compute the height and base:

From sin 75, we derive height = 1.67.
And from cos 75, we obtain base = 0.45.

Calculating area gives us Area = (0.45 * 1.67) / 2, resulting in 0.37 square units.

Thus, the triangle's area is approximately 0.37 square units.
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Sheri’s cab fare was $32, with a 20% gratuity and no taxes. Sheri wrote a check to the cab driver for $40.
zzz [12365]

Indeed, a fare of $40 is a fair charge for the cab ride.

Explanation

Sheri's cab fare totaled $32, with a gratuity rate of 20%.

The gratuity amount is: \$32* 20\% = \$32*0.20= \$6.40

Thus, the total cab fare including gratuity is: \$32+\$6.40 = \$38.40

Since Sheri issued a $40 check to the cab driver, it indicates she provided ($40 - $38.40) or an extra $1.60 to the cab driver. Consequently, the $40 payment is reasonable for the cab fare.

5 0
2 months ago
Read 3 more answers
9. Your mathematics instructor claims that, over the years, 88% of his students have said that math is their favorite class. In
tester [12383]

Response:

Step-by-step breakdown:

For the null hypothesis,

H0: p = 88

For the alternative hypothesis,

Ha: p < 88

In terms of population proportion, where the probability of success is p = 0.88

q represents the probability of failure = 1 - p

q = 1 - 0.88 = 0.12

Considering the sample,

Sample proportion, P = x/n

Where

x = number of successes = 21

n = total samples = 32

P = 21/32 = 0.66

Next, we determine the test statistic, which represents the z-score

z = (P - p)/√pq/n

z = (0.66 - 0.88)/√(0.88 × 0.12)/32 = - 3.83

The relevant p-value corresponds by referencing the normal distribution table for the area falling beneath the z-score. As a result,

P value = 0.00006

8 0
1 month ago
A 16\dfrac1216 2 1 ​ 16, start fraction, 1, divided by, 2, end fraction kilometer stretch of road needs repairs. Workers can rep
lawyer [12517]

Answer:

The repair of the stretch of road will require

weeks to finish.7\frac{1}{3}

Step-by-step explanation:

Provided:

Length of the roads needing repair =

Length of the road workers can fix in a week = 16\frac{1}{2}\ km

To ascertain how many weeks it will take to mend this road stretch.2\frac{1}{4}\ km

Solution:

Worker's road repair rate =   per week.

Overall road length to repair =

2\frac{1}{4}\ km

The time required to repair 16\frac{1}{2}\ km

of road by the workers can be calculated: 16\frac{1}{2}\ km⇒

When dividing mixed numbers, we change them first into fractions.\frac{16\frac{1}{2}\ km}{2\frac{1}{4}\ km}

To compute fraction division, we take the reciprocal of the divisor and substitute division with multiplication:

⇒  \frac{\frac{33}{2}} {\frac{9}{4}}

We revert the fraction back into a mixed number.

Thus, it will take

weeks to complete the road repair task.\frac{33}{2}\times \frac{4}{9}

7 0
2 months ago
Is 9r+16=π5<br> 9<br> r<br> +<br> 16<br> =<br> π<br> 5<br> a literal equation?
PIT_PIT [12445]

Response:

30

Detailed steps:

9r+16=pi5

9r+16=22/7*5

9r+16=15.7

16-15.7=9r

0.3=9r

9r=0.3

r=30

3 0
1 month ago
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