Can you help me i really need it

Mathematics

2 answers:

Sergeeva-Olga [200]3 years ago

5 0

anwers:

B: cameron sells 10 bottles of water for $20

Ket [755]3 years ago

3 0

Answer:

Your wrong, it’s B.

X axis = Number of Bottles of water sold

Y axis = Number of dollars collected

So, (x,y)

That means, (Number of Bottles of water sold,Number of dollars collected)

Finally, (10,20) means he sold 10 bottles of water for $20.

Hope that helped!

Step-by-step explanation:

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3. What property is used to show that 3(4 – 6) = 12 – 18?

Veseljchak [2.6K]

Answer:

You are using <u>Commutative Property </u>

Step-by-step explanation:

7 0

3 years ago

A child wanders slowly down a circular staircase from the top of a tower. With x,y,zx,y,z in feet and the origin at the base of

babymother [125]

Answer:

a) The tower is 90 feet tall

b) She reaches the bottom at t = 18 minutes.

c) Her speed at time t is 5 \sqrt[]{5} ft/minute

d) Her acceleration at time t is 10 ft/minute^2

Step-by-step explanation:

Consider the path described by the child as going down the tower to have the following parametrization $\gamma(t) = (10\cos t, 10 \sin t, 90-5t)$

a) Assuming that the child is at the top of the tower when she starts going down, we have that at the initial time (t=0) we will have the value of the height of the tower. That is z = 90-5*0 = 90 ft.

b) The child reaches the bottom as soon as z =0. We want to find the value of t that does that. Then we have 0 = 90-5t, which gives us t = 18 minutes.

c) Given the parametrization we are given, the velocity of the child at time t is given by $\frac{d\gamma}{dt}= (\frac{d}{dt}(10\cos t), \frac{d}{dt} (10 \sin t ), \frac{d}{dt}(90-5t)) = (-10 \sin t, 10 \cos t, -5)$ . The speed is defined as the norm of the velocity vector,

so, the speed at time t is given by $v = \sqrt[]{(-10 \sin t)^2+(10 \cos t)^2+(-5)^2} = \sqrt[]{100(\sin^2 t + \cos^2 t)+25} = \sqrt[]{125}= 5 \sqrt[]{5}$