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emmasim [6.3K]
3 years ago
15

Multiply. Enter your answers. 8 2 0 × 3 ? ? ? ?

Mathematics
1 answer:
Anettt [7]3 years ago
3 0

Answer:2,460

Step-by-step explanation:

Just use a calculator

820x3=2,460

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A cup of hot coffee is initially at 70 ° C and is left in a room that has a temperature
fgiga [73]

Answer:

It will take 4 minutes and 30 seconds for hot coffee to cool to a temperature of 25 ° C

Step-by-step explanation:

This problem can be modeled by a first order equation

T(t) = TA + kt

In which TA is the temperature at instant zero and r is the rate of warming(g>0) or cooling(k<0). t is the time in minutes.

The initial temperature of the cup of coffee is 70ºC. So TA = 70. The temperature cools  at the rate of 10ºC per minute, so k = -10. So, the equation of the model is:

T(t) = 70 - 10t

We want to know the instant of time when T = 25, so:

25 = 70 - 10t

10t = 70 - 25

10t = 45

t = 4.5 minutes

It will take 4 minutes and 30 seconds for hot coffee to cool to a temperature of 25 ° C

7 0
3 years ago
B||C find the value of y 71 (2y+34)
Nuetrik [128]

Answer:

cheese

Step-by-step explanation:

4 0
3 years ago
Find the surface area of the right triangular prism (above) using its net (below). <br> units
8_murik_8 [283]

Answer:

120 units^2

Step-by-step explanation:

(12)(5)(0.5)(2) + (12)(2) + (13)(2) + (5)(2) = 120 units^2

6 0
3 years ago
There is another equation that describes the path of your fruit or vegetable. This equation is: y=-16t^2+v0t+6 .
Rudiy27

Answer:

The equations have the same mathematical form:

S = A + V0 t - 1/2 g t^2

They are both quadratic equations in one variable (t here)

This equation expresses the distance traveled by an object in time t in the vertical direction  - it does not necessarily refer to a graph

In the other equation, y can be considered a vertical coordinate equation on a graph and x would be the horizontal coordinate

Note that in one equation 3 terms are necessary to describe the displacement of an object in one direction

In the other 2 terms in the x-direction describe the displacement in the other or y-direction

6 0
3 years ago
Please answer these questions!!
Yuri [45]

8. 240/3 = 80 km per hour

80*4 = 320 km answer is A


9.

5.25 / 3 = 1.75 per kg answer is A.


4 0
3 years ago
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