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
58 points I need helpppp!
cricket20 [7]

Answer:

14. x=30, y=15, z=165

15. x=10, y=25

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Scores on a statewide standardized test are normally distributed with a mean of 12.89 and a standard deviation of 1.95. Certific
Ulleksa [173]

Answer:

Marcus score is 13.7, the mean is 12.89, and the standard deviation is 1.95, so I’ll do ( 13.7 – 12.89)/ 1.95, Since Marcus' z-score is 0.415. The area to the left of the z-score is 65.9% so therefore Marcus did scored better than 65.9% of the students. So Marcus needs to score 98% better of all the other students in order for him to receive an actual certificate.

Step-by-step explanation:

4 0
3 years ago
In three separate stock trades Dale los $560, gained $850, and lost $280. What was the net result of the three trades?
romanna [79]

Answer:

$10 profit

Step-by-step explanation:

560+280=840

850-840=10

5 0
3 years ago
What is the approximate volume of a right cone with a diameter of 10 meters and a height of 5 meters use 3.14 pie
ehidna [41]
First of all, it's not pie. It's pi.

Now, the problem.
Radius is always 1/2 x d (d meaning diameter)
That gives us 5.

The formula is 3.14 x 5^2(h/3)
If you solve it from left to right, you get 130.83
7 0
3 years ago
Read 2 more answers
Mary is serving pizza at her party. Including her parents, there are 25 people. Each person will get two slices of pizza and a g
lianna [129]

Answer:

7 pizzas and 9 cans of juice

Step-by-step explanation:

The answer is 7 pizzas because if you add the 25 people plus her parents (That would be two more people) is 27. Then you have to multiply 27×2 that would equal 54. So, now you know you need 54 slices but what you is the amount of pizzas needed. The next step would be to divide 54÷8 that would equal 6.75 but you can't buy 6.75 pizzas, and you can't buy 6 pizzas because than you would leave people outside. You will need to buy 7 pizzas. It is better to have left overs than leaving people outside.

For the amount of cans would be 9 because if you add again 25 people plus her parents it would be 27. Then you multiply 27×1 that is obviously 27. The next step would be to divide 27÷3 and it would equal 9. And that is how you get your answer.

4 0
3 years ago
Other questions:
  • What is the value of X
    7·2 answers
  • Write word form for number 7.351
    10·1 answer
  • Help please need answer fast
    14·1 answer
  • Which property is used in the problem below?
    9·1 answer
  • cheaper for the same amount. 5) The bakers at Healthy Bakery can make 340 bagels in 5 hours. How many bagels can they bake in 15
    7·2 answers
  • What it the length of the leg
    7·1 answer
  • Question 17 of 25
    5·1 answer
  • Without using a calculator find the answers to the following. <br> (5+2) x 6-6
    9·2 answers
  • Jane is trying to finish a reading a book before her assignment is due. Her
    13·1 answer
  • Which expression illustrates the commutative property applied to the product?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!