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
jonny [76]
3 years ago
7

Please help me with the following questions. Thanks in advance!!

Mathematics
1 answer:
Orlov [11]3 years ago
4 0

Answer:

Step-by-step explanation:

Eight

590 = 1800 e^(-0.4t)     Divide by 1800

0.32778 = e^(-0.4t)       Put the value for e in the denominator.

0.32778 = 1 / e^(0.4t)   Notice the sign's gone. Multiply both sides by e^(0.4t)

0.32778 *e^(0.4t) = 1    Divide by 0.32778

e^(0.4t) = 3.0508          Take the natural log of both sides.

0.4t = 1.11542                 Divide both sides by 0.4

t = 2.78855

You should put this in the original equation to see if it checks. It does.

=============================

Nine

3^(3 - 3x) + 6 = 42         Subtract 6 from both sides

3^(3 - 3x) = 36               Take the log of both sides.

(3 - 3x) ln(3) = ln 36

(3 - 3x) *1.098612 = 3.58352   Divide by 1.098612

3 - 3x = 3.26186             Subtract 3 from both sides

- 3x = 0.26186                 Divide by - 3

x = - 0.087287    

You might be interested in
Find the domain of the following function.<br> <img src="https://tex.z-dn.net/?f=f%28x%29%20%3D%20%20%5Csqrt%5B7%5D%7Bx%20-%209%
jarptica [38.1K]
Domain<span>: The set of all possible input values (commonly the "x" variable) It is the set of all real numbers for which a function is mathematically defined.  

</span>f(x) =  \sqrt[1]{x-9} 
<span>
The function has noun defined points nor domain constraints. Therefore, the domain is 

</span>- \infty} \ \textless \  x \ \textless \  \infty}<span>
</span>
7 0
3 years ago
In the diagram below of triangle PQR, S is the midpoint of PR and T is the
Nina [5.8K]

Answer:

ST = 4

Step-by-step explanation:

A segment joining the midpoints of 2 sides of a triangle is half the length of the third side.

ST = \frac{1}{2} PQ substitute values

- 32 + 9x = \frac{1}{2} (- 5x + 28) ← multiply both sides by 2 to clear the fraction

- 64 + 18x = - 5x + 28 (add 5x to both sides )

- 64 + 23x = 28 ( add 64 to both sides )

23x = 92 ( divide both sides by 23 )

x = 4

Then

ST = - 32 + 9x = - 32 + 9(4) = - 32 + 36 = 4

5 0
3 years ago
The usher at a wedding asked each of the 80 guests whether they were a friend of the bride or of the groom. Here are the results
Artyom0805 [142]

Answer: P(B|G) = 3/5 = 0.6

the probability that the guest is the friend of bride, P(bride | groom) is 0.6

Complete Question:

The usher at a wedding asked each of the 80 guests whether they werea friend of the bride or of the groom. The results are: 59 for Bride, 50 for Groom, 30 for both. Given that the randomly chosen guest is the friend of groom, what is the probability that the guest is the friend of bride, P (bride | groom)

Step-by-step explanation:

The conditional probability P(B|G), which is the probability that a guest selected at random who is a friend of the groom is a friend of the bride can be written as;

P(B|G) = P(B∩G)/P(G)

P(G) the probability that a guest selected at random is a friend of the groom.

P(G) = number of groom's friends/total number of guests sample

P(G) = 50/80

P(B∩G) = the probability that a guest selected at random is a friend is a friend of both the bride and the groom.

P(B∩G) = number of guests that are friends of both/total number of sample guest

P(B∩G) = 30/80

Therefore,

P(B|G) = (30/80)/(50/80) = 30/50

P(B|G) = 3/5 = 0.6

5 0
3 years ago
Read 2 more answers
I’ll mark brainliest! Please help!!
Alexxandr [17]

Answer:

A

Step-by-step explanation:

I linked a drawing below

Rectangle ABCD-Purple

Rectangle A'B'C'D'- Turquoise/Blue

Rectangle A''B''C''D''- Maroon/Red

6 0
3 years ago
A triangle has sides with lengths of 20 meters, 21 meters, and 29 meters. Is it a right triangle?
coldgirl [10]

Answer:

Yes, the sides form a right triangle.

Step-by-step explanation:

<u>Pythagorean Theorem:</u>

a² + b² = c²

↓

20² + 21² = 29²

║a² = 20² = 400

║b² = 21² = 441

║c² = 29² = 841

↓

400 + 441 = 841

║This equation is true.

↓

Yes, the sides form a right triangle.

5 0
3 years ago
Other questions:
  • What is the percent of 10
    14·1 answer
  • The work of a student to solve the equation 2(6y − 3) = 20 + 6y is shown below:
    11·2 answers
  • ASAP!! can someone help solve any of these? whoever answers the most gets brainliest, i underlined the questions
    11·1 answer
  • The length l, width w, and height h of a box change with time. At a certain instant the dimensions are l = 3 m and w = h = 6 m,
    14·1 answer
  • What are two other negative integers that have the same sum as -2 and -5​
    15·1 answer
  • In the year 2005, a person bought a new car for $24500. For each consecutive year
    9·2 answers
  • I put C but again I’m not really sure it’s the correct answer.
    8·1 answer
  • Solve the following quadratic equation by completing the square ​
    7·1 answer
  • . A straight line passes through the point (-1,2) and its distance from the origin is
    7·2 answers
  • Select the correct answer.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!