Need this asap please help!

Answers

Answer 1

Answer:

Answer:

Its A

Step-by-step explanation The dolphin swam 3 feet more which is -7

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For the class field trip, the fourth grades at Jefferson Elementary School need to take buses. Each bus fits 55 students and there are 200 students in fourth grade. How many buses will they need?3 buses
3 R20 buses
4 buses
None of these is correct.

Answers

They will need 4 buses.

What is division?

The division in mathematics is one kind of operation. In this process, we split the expressions or numbers into the same number of parts.

Given:

For the class field trip,

the fourth grades at Jefferson Elementary School need to take buses.

Each bus fits 55 students,

and there are 200 students in fourth grade.

The number of buses,

= 200/55

= 3.63

≈ 4.

Therefore, the need is for 4 buses.

To learn more about the division;

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you would need 4 buses to bring all the students because you would still have some students left to ride the bus if you only get 3 buses

Imagine you and Janice are the only ones working as telemarketers for a large cooperation. You make 70% of the calls and each call takes you Exponential amount of time with parameter λ1 = 2 hrs-1 . Janice, on the other hand, makes the remaining 30% of total calls. Each call takes her Exponential amount of time with parameter λ2 = 4 hrs-1 . A certain call was made 30 minutes ago and it is still ongoing. What is the probability that you made this call?

Answers

Answer:

The probability that you made this call is 0.8639.

Explanation:

Parameter for you = λ1 = 2

⇒ β1 = 1 / λ1 = 1 / 2 = 0.5

Parameter for Janice = λ2 = 4

⇒ β2 = 1 / λ2 = 1 / 4 = 0.25

Probability that you made a for 0.5 hours or more:

$P(X\geq 0.5)=e^(-0.5/0.5)=0.3679$

Probability that Janice made a for 0.5 hours or more:

$P(X\geq 0.5)=e^(-0.5/0.25)=0.1353$

Overall probability that a call was made for 0.5 hours of more

= (0.7 x 0.3679) + (0.3 x 0.1353)

= 0.2981

Probability that you made the given call

= 0.7 x 0.3679 / 0.2981

= 0.8639

Help math math math

Answers

Answer:

Yes

Step-by-step explanation:

Answer:

The answer is Yes. Hope this helps :)

Step-by-step explanation:

Find all solutions of the equation algebraically. Check your solutions. (Enter your answers as a comma-separated list x^4-7x^2-144=0

Answers

Answer:

The solutions are: $x=4,\:x=-4,\:x=3i,\:x=-3i$

Step-by-step explanation:

Consider the provided equation.

$x^4-7x^2-144=0$

Substitute $u=x^2\mathrm{\:and\:}u^2=x^4$

$u^2-7u-144=0$

$u^2-16u+9u-144=0$

$(u-16)(u+9)=0$

$u=16,\:u=-9$

Substitute back $\:u=x^2$ and solve for x.

$x^2=16\nx=√(16)\n \quad x=4,\:x=-4$

$x^2=-9\nx=√(-9)\n \quad x=3i,\:x=-3i$

Hence, the solutions are: $x=4,\:x=-4,\:x=3i,\:x=-3i$

Check:

Substitute x=4 in provided equation.

$4^4-7(4)^2-144=0$

$256-112-144=0$

$0=0$

Which is true.

Substitute x=-4 in provided equation.

$(-4)^4-7(-4)^2-144=0$

$256-112-144=0$

$0=0$

Which is true.

Substitute x=3i in provided equation.

$(3i)^4-7(3i)^2-144=0$

$81+63-144=0$

$0=0$

Which is true.

Substitute x=-3i in provided equation.

$(-3i)^4-7(-3i)^2-144=0$

$81+63-144=0$

$0=0$

Which is true.

What is 75 equal to?

A.) 7x 5
B. 5x5x5x5x5x5x5
C.7x7x7x7x7
D. 5 ‘7

Answers

Answer:

Step-by-step explanation:

you are multiplying 7 by its self 5 times

Final answer:

75 does not equal any of the options provided in the question. The calculations for each option yield numbers that are either larger or smaller than 75.

Explanation:

The number 75 can be best expressed as equal to 7x5 based on the options given in the question. Let's do a quick math check to confirm:

A) 7x5 = 35, which is not equal to 75.

B) 5x5x5x5x5x5x5 = 78125, which is much larger than 75.

C) 7x7x7x7x7 = 16807, which is also much larger than 75.

D) The last option 5 '7 does not make mathematical sense.

So, based on the calculations, none of the given options correctly express the number 75.

Learn more about Basic Mathematics here:

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John has taken out a loan for college. He started paying off the loan with a first payment of $100. Each month he pays, he wants to pay back 1.1 times as the amount he paid the month betore. Explain to Jo howto represent his first 20 payment n sigma notation.Then esplain how to tind the sum of his frst 20 pyments, using complete sentences. Esplain why this series is convergent or divergent

Answers

Since each term of the series is 1.1 times the previous one, the series is geometric. The generic term of a geometric series is
$a_(n)=a_(0)\cdot r^((n-1))$

The sum in sigma notation simply adds these terms. The leading factor of 100 can be factored out.
$sum=\displayform{100\cdot\sum\limits_(n=1)^(20){1.1^((n-1))}}$

The sum can be found by adding the terms or by using the formula for the sum of a geometric series. In the latter case, we have
$sum=100\cdot(1.1^(20)-1)/(1.1-1)\approx5727.50$

The series is divergent because the common ratio of terms is greater than 1. (Of course, any finite number of terms will have a finite sum.)

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Emily simplified this expression. Expression: (5−2)2+23×4 Step 1: (3)2+23×4 Step 2: 9+23×4 Step 3: 9+9×4 Step 4: 9+36 Step 5: 45 Emily made a mistake. Which step shows her first mistake? Step 1 Step 2 Step 3 Step 4

Factor the polynomial below X cubed +12 X squared +36X

Holly works at a garage.Mr Bakir brings his car in for a service.He also buys 2 tyres and a battery.Holly has this list of costs• service £110• tyres £49.99 each• battery £89She uses this list to start to work out the bill for Mr Bakir.Holly also has to charge 20% VAT on the costs to work out the total bill.Work out the total bill. (You MUST show your working in the box below)(4 Points)