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3 years ago

Can u help me pls, 10 pts

Mathematics

1 answer:

Otrada [13]3 years ago

6 0

260 because the tens position is the far right one before the decimal, and the number is above 5.

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Find the LCM of 13 and 52.

lesya692 [45]

The LCM is the smallest common multiple. To find this, list the multiples of each number

52: 52, 104, 156....
13: 13, 26, 39, 52.....

the smallest number that is a mutiple of both is 52.

so, the LCM of 13 and 52 is 52.

Hope this helps!

4 0

4 years ago

I need help with number 7.

MakcuM [25]

Answer is 4800 and draw a prism like this I'll show you

3 0

4 years ago

Mr. Ratchett, an elderly American, was found murdered in his train compartment on the Orient Express at 7 AM. When his body was

nasty-shy [4]

Answer: Mr. Ratchett died approximately at 2AM.

Step-by-step explanation: <u>Newton's</u> <u>Law</u> <u>of</u> <u>Cooling</u> shows the cooling rate between a body and the environment, by stating that the rate is proportional to the difference in temperatures between them.

Mathematically, it is represented as:

$\frac{dQ}{dt}=\alpha.A.(T_{s}-T)$

This differential equation solved, gives the solution:

$T(t)=T_{s}+(T_{0}-T_{s})e^{-kt}$

where

$T_{s}$ is temperature of the environment

$T_{0}$ is the initial temperature of the body

k is a parameter dependent of heat transfer coefficient, heat capacity and area of the body

t is time required to change the temperature

For the murder on the Orient Express, first determine parameter k.

In 1 hour, Mr. Ratchett's body decrease 1°:

$27=22+(28-22)e^{-1k}$

$5=6e^{-k}$

$e^{-k}=\frac{5}{6}$

$ln(e^{-k})=ln(0.834)$

k = 0.1823

Using the parameter, find estimate time:

$28=22+(37-22)e^{-0.1823t}$

$6=15e^{-0.1823t}$

$ln(e^{-0.1823t})=ln(0.4)$

0.1823t = 0.9163

$t=\frac{0.9163}{0.1823}$

t ≈ 5 hours

The body was found at 7AM. So, it took approximately 5 hours to cool down to 28° at that time. Therefore, Mr. Ratchett died at 2AM.

5 0

3 years ago

State if the triangles are similar. If so, how do you know they are similar and complete the similarity statement.

Mazyrski [523]

Answer:

D. similar; AA similarity; ∆CSD

7 0

3 years ago

Succesive approximation

borishaifa [10]

The Approximate the solution to the equation using three iterations of successive approximation is option b: 27/8.

<h3>What is the iterations about?</h3>

In the equation given:

Note that:

x²-3x+2 = square root √x-2 + 2

Therefore:

x⁴-6x³+9x²= square root x-2

x² = 3.375

Convert 3.35 into fractions and will get 27/8. So, The Approximate the solution to the equation using three iterations of successive approximation is option b: 27/8.

Learn more about Successive approximation from

brainly.com/question/27278132

#SPJ1

3 0

2 years ago