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3 years ago

How to get 813 with exponents parentheses in three different operations

Mathematics

1 answer:

LenKa [72]3 years ago

4 0

Answer:

813 = 800 + 10 + 3 = (8 $\times 10^{2}$ ) + ( 1 $\times 10^1$ ) + ( 3 $\times 10^0$ )

Step-by-step explanation:

i) 813 = 800 + 10 + 3 = (8 $\times 10^{2}$ ) + ( 1 $\times 10^1$ ) + ( 3 $\times 10^0$ )

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Alaska has a land area of about 1,700,000 square kilometers. Florida has a land area 1/10 the size of Alaska. What is the land a

lisov135 [29]

A = 1.7 million km^2

F = 0.1 x 1.7 million km^2

-------------------------------------

Therefore:

F= 0.17 million km^2

Answer:

170,000 km^2

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3 years ago

A landscaper is designing a flower garden in the shape of a trapezoid. She wants the shorter base to be 3 yards greater than the

Kitty [74]

The equation is to be given, judging by the tone problem given but apparently it's not given. The equation can be derived from the problem. The area of a trapezoid is given by the equation $A = \frac{(a+b)}{2} h$ . Also, given that a, is the longer side, then a = h+7 and b (shorter side) = h+3 and h is the height. the equation is then $A = \frac{(h+3)(h+7)}{2}h = 225$ . Solving this quadratic equation, h is 4.84.

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3 years ago

Read 2 more answers

True or False: A race car driver tested his car for time from 0 to 60 mph, and for 20 tests obtained a mean of 4.85 seconds with

sattari [20]

Answer:

The given statement is false.

Step-by-step explanation:

We are given the following in the question:

95% confidence interval: (4.53,5.18)

Sample mean, $\bar{x}$ = 4.85 seconds

Sample size, n = 20

Alpha, α = 0.05

Sample standard deviation, σ = 1.47 seconds

Degree of freedom = n - 1 = 19

95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 4 and}~\alpha_{0.01} = \pm 2.09$

$4.85 \pm 2.09(\dfrac{ 1.47}{\sqrt{20}} )\\\\ = 4.85 \pm 0.69 \\\\= (4.16 ,5.54)$

Thus, the calculated confidence interval is different from the given confidence interval.

Hence, the given statement is false.

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4 years ago

A chess tournament starts at 12:30 p.m. and ends at 5:00 p.m. Does the tournament last more than 5 hours? Use the drop‐down menu

pychu [463]

The tournament does not last more than 5 hours because the duration of the tournament is 4.5 hours.

<h3>What is an arithmetic operation?</h3>

It is defined as the operation in which we do the addition of numbers, subtraction, multiplication, and division. It has a basic four operators that is +, -, ×, and ÷.

We have a chess tournament starts at 12:30 p.m. and ends at 5:00 p.m.

The difference between 12:30 p.m. and 5:00 p.m. can be calculated after changing time into 24 hours clock

12:30 p.m. = 12 hours 30 minutes = 12.50

5: 00 p.m. = 17 hours 00 minutes = 17.00

Difference between them:

= 17.00 - 12.50

= 4.5 hours

4.5 < 5

Thus, the tournament does not last more than 5 hours because the duration of the tournament is 4.5 hours.

Learn more about the arithmetic operation here:

brainly.com/question/20595275

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2 years ago

A stone monument is the shape of a pyramid. The width of the base is 12 m and the length of the base is 9 m. The height of the m

inessss [21]

V=(LxWxH)/3 so, V= (9x12x15)/3 = 1,620/3 = 540m^3. From here you multiply 540m^3 by 3,000kg/m^3 and get 1,620,000kg. Then you divide 1,620,000kg by 2,000kg/metric tonne and get 810 metric tonnes.

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3 years ago