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3 years ago

I need help for number 13-16 and I also need an explanation please help

Mathematics

2 answers:

mihalych1998 [28]3 years ago

6 0

In question 13 you must find the volume of the prism in 1/6 in. There are 13 1/6in in 2 1/6in, 7 1/6in in 1 1/6in, and 6 in 1in, so you multiply 13 * 7 * 6 = 546

Find the volume in Q14, 4 2/5 * 3 1/2 * 2 1/4

Convert

$\frac{12}{5}$ * $\frac{7}{2}$ * $\frac{9}{4}$ = 18.9

The answers on the third one are A, C, and F

The answers on the fourth one are B, D, and E

 Hopefully it helps!!

Natalka [10]3 years ago

3 0

For the first three you need to find volume, so the formula for volume is b*w*h. base*width*hight. so multiply all three numbers together and you will find your answer.

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Part B: (also explained above). Every month the number of visitors approximately doubles. Starting with 5.74 at month 8, the numbers goes up by about the same amount to 12.0 at month 9. At month 10, a similar increase occurs (doubling would be 24, and the data shows 25, so this is all "aproximate"). This trend continues throughout the table.

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2 years ago

A long jumper lifts off 3 m after starting his run, and lands 6 m later. When he is 8 m from the start line, he is 5 cm above an

slega [8]

Answer:

The equation of the parabola that models the path of the long jumper through the air is $y = -x^{2}+12\cdot x -27$ .

Step-by-step explanation:

Mathematically, we know that parabolas are second-order polynomials and every second-order polynomials, also known as quadratic functions, can be constructed by knowing three different points of the curve. The standard form of the parabola is:

$y = a\cdot x^{2}+b\cdot x + c$

Where:

$x$ - Horizontal distance from the start line, measured in meters.

$y$ - Height of the long jumper, measured in meters.

$a$ , $b$ , $c$ - Polynomial constants, measured in $\frac{1}{m}$ , dimensionless and meters, respectively.

If we know that $(x_{1},y_{1}) = (3\,m, 0\,m)$ , $(x_{2},y_{2}) = (8\,m, 0.05\,m)$ and $(x_{3}, y_{3}) = (9\,m, 0\,m)$ , this system of linear equations is presented below:

$9\cdot a + 3\cdot b + c = 0$ (Eq. 1)

$81\cdot a + 9\cdot b + c = 0$ (Eq. 2)

$64\cdot a + 8\cdot b + c = 0.05$ (Eq. 3)

The coefficients of the polynomial are, respectively:

$a = -\frac{1}{100}$ , $b = \frac{3}{25}$ , $c = -\frac{27}{100}$

The equation of the parabola that models the path of the long jumper through the air is $y' = -\frac{1}{100}\cdot x^{2}+\frac{3}{25}\cdot x -\frac{27}{100}$ .