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Julli [10]
3 years ago
8

Work out 5 x 10^6 / 4 x 10^4 Give your answer as an ordinary number.

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
5 0

Answer:

1.25 \times  {10}^{2} = 125

Step-by-step explanation:

\frac{5 \times  {10}^{6} }{4 \times  {10}^{4} }  =  \frac{5}{4}  \times  \frac{ {10}^{6} }{ {10}^{4} }  = 1.25 \times  {10}^{2} = 125

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Sandra throws an object straight up into the air with initial velocity of 38 ft per square from platform that is 30 ft above the
expeople1 [14]

Answer:

3 seconds.

Step-by-step explanation:

We have been given that Sandra throws an object straight up into the air with initial velocity of 38 ft per second from platform that is 30 ft above the ground.

To find the time it will take for object to hit the ground, we will use formula:  

h(t)=-16t^2+v_0t+h_0, where, v_0 represents initial velocity and h_0 represents initial height.

Upon substituting our given initial velocity and initial height, we will get:

h(t)=-16t^2+38t+30

We know that object will hit the ground, when height will be 0, so we will equate object's height equal to 0 and solve for t as:

-16t^2+38t+30=0

Divide by 2:

-8t^2+19t+15=0

Upon using quadratic formula, we will get:

t=\frac{-b\pm\sqrt{b^2-4ac}}{2a}=\frac{-19\pm\sqrt{19^2-4(-8)(15)}}{2(-8)}

t=\frac{-19\pm\sqrt{361+480}}{-16}=\frac{-19\pm\sqrt{841}}{-16}

t=\frac{-19\pm29}{-16}

t=\frac{-19-29}{-16},t=\frac{-19+29}{-16}

t=\frac{-48}{-16},t=\frac{10}{-16}

t=3,t=-\frac{5}{8}

Since time cannot be negative, therefore, it will take 3 seconds for object to hit the ground.

7 0
3 years ago
Selected value of each decimel number when it is rounded to the nearest whole number ​
PtichkaEL [24]

Answer:

  1. 5
  2. 6
  3. 6
  4. 5

Remember the decimal <em>hundredths</em> rounding ruleset.

  • If a decimal is below .50, round down.
  • If a decimal is .50, round up.
  • If a decimal is above .50, round up.

View this array below to get a better image.

\left[\begin{array}{ccc}0.49(down)&0.50(up)&0.51(up)\end{array}\right]

So, for example, if you had 6.51, you would round that up to 7, and if you had 8.47, you would round that to 8

6 0
2 years ago
A) -8<br> B) 0<br> C) 1 o/ 2 1 over 2 <br> D) 8
seropon [69]
Your answer is C If not A have a good day
7 0
3 years ago
Read 2 more answers
Mike is giving roses to some children at a carnival. He has 7 red roses, 8 yellow roses, and 9 white roses. If Mike selects a ro
Anika [276]
The probability, in simplest form, is 3/23.

There are 9+8+7=24 roses.  The probability of drawing a white rose first is 9/24.  The probability of then drawing a yellow rose is 8/23, as one of the roses is gone.  The total probability is 9/24(8/23) = 72/552 which then simplifies to 3/23.
8 0
3 years ago
Read 2 more answers
Help Please!? Thank You!
swat32
A. left 2 units

the vertex form of a parabola is
y = a(x-h)^2 + k
(h,k) is the point of the vertex

since h is -2 in (x+2)^2
the function is shifted 2 units left
3 0
3 years ago
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