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3 years ago

Dare to solve it so easy ☺️

Mathematics

1 answer:

qaws [65]3 years ago

7 0

Answer: 1.23×10¹⁶

Step-by-step explanation:

For this problem, we want to use order of operations to solve.

Parenthesis

Exponent

Multiply

Divide

Add

Subtract

Let's first solve the parenthesis.

$(9*\frac{999999999}{9+9+9+9+9+9+9+9+9} )^2$ [add denominator]

$(9*\frac{999999999}{81} )^2$ [cross multiply]

$(\frac{999999999}{9} )^2$ [divide]

$(111111111)^2$ [exponent]

1.23×10¹⁶

The ending result is way too large. Therefore, we use scientific notation and get 1.23×10¹⁶.

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Brian invests £8500 into his bank account.

iragen [17]

8500*1.057==??
??*1.057==??
6 times
You will have in 6 years £11854,1072

8 0

4 years ago

Read 2 more answers

Explain how to find the quotient of: (8a3+31a2-20a-5)/(8a-1)

pashok25 [27]

Answer:

Quotient = a²+ 4a- 2

Step-by-step explanation:

(8a3+31a2-20a-5)/(8a-1)

a² +4a-2 ⇒ quotient

(8a-1)√(8a3+31a2-20a-5)

8a²- a² ⇒ Multiplying (8a-1) by a²

- + ⇒ Changing signs

32a²- 20a- 5

32a²- 4a ⇒ Multiplying (8a-1) by 4a

- + ⇒Changing signs

-16a -5

- 16a +2 ⇒ Multiplying (8a-1) by -2

+ - ⇒ Changing signs

-7 ⇒ Remainder

We follow the steps of simple division to get the quotient which is a²+ 4a- 2

We multiply (8a-1) by factors such as a², +4a and -2 to get the same terms as given in the dividend.

4 0

3 years ago

b. Find a 99% confidence interval for mean age of ICU patients using the facts that, in the sample, the mean is 57.55 years and

rjkz [21]

Answer:

99% of confidence intervals for mean age of ICU patients

(53.8920 , 61.2079)

Step-by-step explanation:

Explanation:-

Given sample mean $x^{-} = 57.55$

Given standard error is determined by

S.E = $\frac{S.D}{\sqrt{n} }$

Given data standard error = 1.42

99% of confidence intervals for mean is determined by

$(x^{-} - Z_{0.01} \frac{S.D}{\sqrt{n} } , x^{-} + Z_{0.01} \frac{S.D}{\sqrt{n} } )$

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.01}{2} } = Z_{0.05} = 2.576$

$(x^{-} - 2.576 S.E , x^{-} + 2.576 S.E)$

$(57.55 - 2.576X 1.42 , 57.55+ 2.576 X1.42)$

(53.8920 , 61.2079)

Conclusion:-

99% of confidence intervals for mean is determined by

(53.8920 , 61.2079)

5 0

3 years ago

3+ (-9). Should you add or subtract 3 and 9? Why?

marta [7]

You subtract because it's just adding a negative which cancels out the adding and makes it a subtraction problem.

8 0

4 years ago

Read 2 more answers

A train traveled 3/5 of the distance between two cities in 1/4 of an hour. At this rate, what fraction of the distance between t

Mkey [24]

Answer: 2 2/5 distance

Step-by-step explanation:

You know 1/4 of an hour you travel of 3/5 of distance, so let’s set an proportion: 1/4 hr = 3/5 of distance, multiply 4 on both sides, and you get 2 2/5 distance. Hope this helps!

4 0

4 years ago

Dare to solve it so easy ☺️​

Dare to solve it so easy ☺️