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3 years ago

11

You estimate that there are 80 marbles in a jar. the actual amount is 76 marbles. find the percent error. round to the nearest t

enth of a percent if necessary.

2 answers:

Afina-wow [57]3 years ago

8 0

$\frac{actual - estimated}{actual}$
= $\frac{76 - 80}{76}$
= $\frac{-4}{76}$
= -0.0526
= -5.26%
≈ -5.3%

yKpoI14uk [10]3 years ago

7 0

76/80

Just divide 76 out of 80 and round it to the nearest hundredth Or at least that’s what I think

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Please help and explain if so thank you

myrzilka [38]

Answer:

<em>y = 6</em>

Step-by-step explanation:

Slope-intercept form:

y = mx + b

m = slope; b = y-intercept

A line with slope 0 is a horizontal line. Since one point on the line has y-coordinate 6, then all points on the line have y-coordinate 6. The y-intercept is 6.

m = 0; b = 6

y = mx + b

y = 0x + 6

y = 6

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3 years ago

vaieri [72.5K]

I DON'T UNDERSTAND MATH ANYMORE!!!!!!!!

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3 years ago

The height of the tunnel at the center is 35ft, and the vertical clearance must be 21 ft at a point of 8ft from the center. Find

Zinaida [17]

Answer:

y=-0.215x^2+35

Step by Step:

Let, $h=0$ , $k=35$ , $x=8$ , $y=21$

We know that, the general equation of the parabola.

$y-k = a(x-h)^2$

$\Rightarrow y=a(x-h)^2+k .........(i)$

Substitute the value of $h, k, x, y$ in equation $(i)$ and find the value of $a.$

$21=a(8-0)^2+35$

$\Rightarrow 21=a\times 8^2+35$

$\Rightarrow 21=64a+35$

$\Rightarrow 64a=21-35$

$\Rightarrow 64a=-14$

$\Rightarrow a=\frac{-14}{65}$

$\Rightarrow a=-0.215$

Hence, the equation of the parabola is:

$y=-0.215x^2+35$

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3 years ago

terry opened a savings account in December with $132 and saved $27 each month beginning in January the value of terrys account i

liq [111]

Let S be the amount in a savings account.
Let m be the number of months.

General equation
S = 132 + 27m

Specific question
July is the 7th month of the year including both January and July.
S = 132 + 7*27
S = 132 + 189
S = 321

Reasonableness?
Good question. You could estimate an answer.
Start with 150 dollars and say that you add 25 a month.
7 * 25 = 175
S = 150 + 175 = 325 All of this was done in my head. Since the exact answer obtained using the formula is 321, I think that's pretty reasonable using my estimate is a guide.

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3 years ago

You might need: Calculator

Artist 52 [7]

Answer:

117 pages

Step-by-step explanation:

114 + 3 = x

x = 117

5 0

3 years ago