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3 years ago

CAN SOMEONE PLEASE HELP ME ASAP I DONT HAVE MUCH TIME!!!!!!!!!!!!!!!!!! 60 POINTS!!!!

Mathematics

2 answers:

yarga [219]3 years ago

4 0

The first one is C.

The second one is also C.

Brainliest Plzz

babymother [125]3 years ago

4 0

Answer:

second c

hope this helps trying to help

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Fiesta28 [93]

9.42 I think its 9.42

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4 years ago

A jumping spider's movement is modeled by a parabola. The spider makes a single jump from the origin and reaches a maximum heigh

aleksklad [387]

The spider's movement is an illustration of a parabola.

The equation of a parabola is: $\mathbf{y = -\frac{1}{160}(x - 40) + 10}$
The focus of a parabola is: (40,-30)
The axis of symmetry is: $\mathbf{x = 40}$
The directrix is: $\mathbf{y = 50}$

<u>(a) The equation</u>

The spider passes through the origin.

So, we have:

$\mathbf{(x,y) = (0,0)}$

The spider jumps to a maximum height of 10mm, midway 80mm.

So, the vertex is:

$\mathbf{(h,k) = (40,10)}$

The equation of a parabola is:

$\mathbf{y = a(x - h)^2 + k}$

So, we have:

$\mathbf{0 = a(0 - 40)^2 + 10}$

Subtract 10 from both sides

$\mathbf{a(0 - 40)^2 =- 10}$

$\mathbf{1600a =- 10}$

Solve for a

$\mathbf{a =- \frac{1}{160}}$

Substitute $\mathbf{a =- \frac{1}{160}}$ and $\mathbf{(h,k) = (40,10)}$ in $\mathbf{(h,k) = (40,10)}$

$\mathbf{y = -\frac{1}{160}(x - 40) + 10}$

<u>(b) The focus, directrix and the axis of symmetry</u>

The focus of a parabola is:

$\mathbf{Focus= (h, k + p)}$

Where:

$\mathbf{p = \frac{1}{4a}}$

So, we have:

$\mathbf{p = \frac{1}{4 \times -1/160}}$

$\mathbf{p = -\frac{160}{4}}$

$\mathbf{p = -40}$

So, we have:

$\mathbf{Focus = (40,10-40)}$

$\mathbf{Focus = (40,-30)}$

The axis of symmetry is:

$\mathbf{x = h}$

So, we have:

$\mathbf{x = 40}$

The directrix is:

$\mathbf{y = k - p}$

$\mathbf{y = 10 + 40}$

$\mathbf{y = 50}$

Read more about parabolas at:

brainly.com/question/25237745

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3 years ago

What is 0.3636... round to the nearest tenth?

miskamm [114]

0.36.
tenth position is b in . 0.ab

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4 years ago

A postulate is not __________. A. proven true by undefined terms and definitions B. accepted as true without proof C. used to ju

quester [9]

The answer is b

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3 years ago

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Please help!

PolarNik [594]

$1,200=to repair his home
21%=interest
$121=every month
12=month

21. X
——= ———-
100. 1200
Cross multiply
21*1200=25200
100*x=100x
25200/100=252
So Loki paid $252 interest

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4 years ago

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