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4vir4ik [10]
3 years ago
12

I need help with this question

Mathematics
1 answer:
Serhud [2]3 years ago
3 0
First off, let's pick a variable.
Since the number of years is unknown, that can be made into our "x".
Now then: we know that the level is currently 72 inches below sea level. It sinks two inches each year.
Those two pieces of information tell us (a) the starting point and (b) the rate at which the level drops.
Since the rate is -2 inches per year, this can be represented by -2x.
The 72 inches is the beginning point, however since it is 72 inches UNDER sea level, we need to make this a negative.
Now we combine the two in order to create the expression of:

-72 - 2x
where x is the years of which New Orleans has been sinking.
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LekaFEV [45]
N=410,439
You can just type your problem into a calculator-- you're just finding out what 420,008-9,569 is. :)
4 0
3 years ago
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A multiple-choice test contains 10 questions. There are four possible answers for each question. a) In how many ways can a stude
AnnZ [28]

Answer :

<h3>4^{10} <u> =1048576 ways </u> a student can answer the questions on the test if the student answers every question.</h3>

Step-by-step explanation:

Given that a multiple-choice test contains 10 questions and there are 4 possible answers for each question.

∴ Answers=4 options for each question.

<h3>To find how many ways  a student can answer the given questions on the test if the student answers every question :</h3>

Solving this by product rule

Product rule :

<u>If one event can occur in m ways and a second event occur in n ways, the number of ways of two events can occur in sequence is then m.n</u>

From the given the event of choosing the answer of each question having 4 options is given by

The 1st event of picking the answer of the 1st question=4 ,

2nd event of picking the answer of the 2nd question=4 ,

3rd event of picking the answer of the 3rd question=4

,....,

10th event of picking the answer of the 10th question=4.

It can be written as  by using the product rule

=4.4.4.4.4.4.4.4.4.4

=4^{10}

=1048576

<h3>∴ there are 1048576 ways a student can answer the questions on the test if the student answers every question.</h3>
3 0
2 years ago
What kinetic energy has a 4kg shootput thrown with a velocity of 12m/s
Tamiku [17]

Answer:

288J

Step-by-step explanation:

recall the formula for kinetic energy

KE = (1/2) mv²

where m is the mass (= 4kg)  and v is the velocity(=12 m/s)

hence

KE = (1/2) (4)(12)² = 288J

7 0
3 years ago
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velikii [3]

7(a−3+4b)

distribute

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7a-21+28b

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Which of the following is not true?
cestrela7 [59]

The last statement is NOT true.

1/2 divided by 4 is 0.125 and 1/2 times 4/1 is 2

Hope I helped!

4 0
3 years ago
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