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2 years ago

Which choice is equivalent to the expression below ? 3^7.869

Mathematics

2 answers:

max2010maxim [7]2 years ago

6 0

The second one:
3^7 x 3^(86/10) x 3^(9/1000)
That is because when you multiply powers with the same base ( in this case they are all 3), you just leave the base as it is and add the exponents
so it is basically 3^(7 + 86/100 + 9/1000) which is 3^7.869

KonstantinChe [14]2 years ago

3 0

Answer:

3^7 x 3^8/10 x 3^6/100 x 3^9/1000

Step-by-step explanation:

APEX

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Lucy wants to be exempt from her semester exam. In order for that to happen, she has to average an 85 over 3 test grades. Her fi

anastassius [24]

Answer:

Grades to be scored in 3rd exam = 88

Step-by-step explanation:

Given that average of 3 numbers is 85.

First two numbers are 81 and 86.

To find:

3rd number so that average is 85

Solution:

Let the third number = $x$

Formula for average is:

$Average = \dfrac{Sum\ of\ numbers}{Total\ count\ of\ numbers}$

Here, sum of numbers = $81+86+x =167+x$

Total count of numbers = 3

$85 = \dfrac{167+x}{3}\\\Rightarrow x=255-167\\\Rightarrow \bold{x=88}$

Grades to be scored in 3rd exam = 88

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3 years ago

Deon is a software salesperson. His base salary is $1800 and he makes $80 more for every copy of Math is Fun he sells. His total

Vinvika [58]

(a) 34 copies

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3 years ago

What is the area, in yards, of a box thats 38 feet wide by 15 feet long?

pshichka [43]

Answer:

570

step-by-step explanation:

assuming you're talking about a 2-dimensional rectangle,

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base = 38

width = 15

Area = 38 * 15

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2 years ago

Read 2 more answers

G(t)=t³+5t²; Find g(-1)

erik [133]

Answer:

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Step-by-step explanation:

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2 years ago

I need help on 11-16

alisha [4.7K]

I cant see all of 11 and 14
12:
$3f = 18 \\ \frac{3f}{3} = \frac{18}{3} \\ f = 6$
13:
$3f = {3}^{2} \\ 3f = 9 \\ \frac{3f}{3} = \frac{9}{3} \\ f = 3$
15:
$3h = 9 + 10 \\ 3h = 19 \\ \frac{3h}{3} = \frac{19}{3} \\ h = 6.3$
16:
$3f = 27 - 21 \\ 3f = 6 \\ \frac{3f}{3} = \frac{6}{3} \\ f = 2$

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3 years ago