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4 years ago

8

Brad wants to open a new savings account. He finds one that returns 3% on his investment each year Assign a variable to each of

the following pieces of information

1 answer:

sergiy2304 [10]4 years ago

4 0

Final balance = ( your choice of a variable )
Initial investment = ( your choice of a variable )
Return rate = ( your choice of a variable )

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At an elevation of 1221.4 feet, Lake Mead will hold 28,945,000 acre-feet of water. Which number is the best estimate of this amo

dsp73

The estimate of the amount 28,945,000 is 3 × 10⁷

<h3>What is an estimate of a value?</h3>

An estimate is a rough or approximate calculation or judgement value.

The question is with regards to the scientific notation which is of the form a × 10ᵇ, where absolute <em>a</em> is of a value 1 ≤ a < 10

The scientific notation form of a number is found as follows;

The decimal point on the number is moved from its position to the point such that the number of non zero numbers to the left of the decimal point is 1

The number <em>b</em> is the number of places to which the decimal point is moved.

<em>b</em> is positive when the decimal point is moved to the left

<em>b</em> is negative when the decimal point in the number is moved to the right

<em>b</em> is zero when the decimal point is not moved

The scientific notation number formed, <em>a</em> × 10ᵇ, which is read as <em>a</em> times 10 raised to the power <em>b</em>.

The zeros in the tail to the right of the decimal point are removed

The number 28,945,000 in scientific notation is 2.8945 × 10⁷

The number part of the scientific notation is approximated to the next higher whole number, as follows;

The first digit to the right of the decimal point is 8 which is larger than 5, therefore the 2 is increased to 3

The approximated number is therefore;

3 × 10⁷

Learn more about scientific notation in mathematics here:

brainly.com/question/5756316

#SPJ1

6 0

1 year ago

Eduardo spend 35% of his time at the theme park on a roller coaster.if he was there for 8 hours ,how much time did he spend on r

dalvyx [7]

He was there 2.8 hours

8 0

4 years ago

The angle e lies in Quadrant II.<br>sin 0 = 3/4 <br>What is cos O?

Vilka [71]

Answer:

-√7/4

Step-by-step explanation:

Mathematically;

Sine is the ratio of opposite to hypotenuse

So here, hypotenuse is 4

The opposite is 3

To get the adjacent, we use the Pythagoras’ theorem which states that the square of the hypotenuse is equal the sum of the squares of the two other sides

Let the adjacent be x

4^2 = 3^2 + x^2

x^2 = 16-9

x^2 = 7

x = √7

The cosine is the ratio of the adjacent to the hypotenuse

Since we want to consider quadrant II

Cosine is negative here;

So the answer for Cos will be;

Cos theta = -√7/4

4 0

3 years ago

Please take a look at the picture

madam [21]

Answer:

B) -3/10 x -6

Step-by-step explanation:

-3/10 x -6=-3 x -6/10

When multiplying two negatives you get a positive.

Hope this helps :)

8 0

3 years ago

Read 2 more answers

What is the measure if x?

pantera1 [17]

The value of x would be 43°. You would find this by breaking up that side of the line into a sum of 180° (a half circle). Then you would do 180°-47°-90°(which accounts for the sum of degrees of the fourth quadrant) and that = 43°.

3 0

4 years ago