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3 years ago

How do you find the area of a triangle if you only know it's three sides?

1 answer:

8 0

You would have to find the height.

To do this, you cut the triangle from the upper vertex to the base to create two new triangles.

Then you use the Law of Cosines. You could use the google calculator for this by searching “law of cosines calculator” and inputting the values, but in case of a test, the formula is a^2 = b^2 + c^2 - 2bc cosA

If you could provide an example of a triangle, I will gladly help you with the steps! Hope this helped!

You might be interested in

Numbers between 40 and 80 with a 7 in the ones place

faltersainse [42]

47, 57, 67, 77 are the numbers.

5 0

3 years ago

A 25,000-gallon swimming pool needs to be completely drained for maintenance purposes.

egoroff_w [7]

Answer:

A: 1800h-25,000

B: Yes, he would have time.

Step-by-step explanation:

Lets turn 30 gallons/minute into hours so we can make it easier.

18000h-25000

Then plug in h which is hours. To get your answer

From May 7 at 8:00 a.m. to May 8 at 12 p.m. would be 28 hours.

So we plug in 28 for h and get our answer of 25400 gallons/hour

8 0

3 years ago

(3 points) In Illinois, 9% of all drivers arrested for DUI (Driving Under the Influence) are repeat offenders; that is, they hav

den301095 [7]

Answer:

22.60% probability that exactly 3 people are repeat offenders

Step-by-step explanation:

For each driver arrested selected, there are only two possible outcomes. Either they are repeat offenders, or they are not. The probability of an arrested driver being a repeat offender is independent from other arrested drivers. So we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

In Illinois, 9% of all drivers arrested for DUI (Driving Under the Influence) are repeat offenders;

This means that $p = 0.09$

Suppose 28 people arrested for DUI in Illinois are selected at random.

This means that $n = 28$

a) What is the probability that exactly 3 people are repeat offenders

This is $P(X = 3)$

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 3) = C_{28,3}.(0.91)^{25}.(0.09)^{3} = 0.2260$

22.60% probability that exactly 3 people are repeat offenders

4 0

3 years ago

In the year 2006, a company made $2.4 million in profit. For each consecutive year after that, their profit increased by 12%. Ho

Dmitriy789 [7]

Answer:

Step-by-step explanation:

For each consecutive year after that, their profit increased by 12%. The growth is exponential. We would apply the formula for exponential growth which is expressed as

A = P(1 + r)^t

Where

A represents the profit made after t years.

t represents the number of years.

P represents the initial profit made.

r represents rate of increase.

From the information given,

P = 2.4 × 10^6

r = 12% = 12/100 = 0.12

t = 4 years

Therefore,

A = 2.4 × 10^6(1 + 0.12)^4

A = 2.4 × 10^6(1.12)^4

A = 3776446.5

4 0

3 years ago

What is the exact value of y= cos^-1 (-1/2)? <br><br> Thank you in advance

olga_2 [115]

Answer:

y=<u>2π</u>

Step-by-step explanation:

4 0

3 years ago