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3 years ago

Which number comes next in the pattern write your answer in the box below 8.80,8.45,8.10,7.75 --------

Mathematics

2 answers:

eimsori [14]3 years ago

7 0

Find the difference between each number:

8.80 - 8.45 = 0.35

8.45 - 8.10 = 0.35

8.10 - 7.75 = 0.35

The next number in the series is 0.35 less then the previous number.

Next number = 7.75 - 0.35 = 7.40

Answer: 7.40

viktelen [127]3 years ago

3 0

Answer:

Step-by-step explanation:

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The maximum number groups would be 4, which contain 9 girls and 10 boys in each group.
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3 years ago

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The total price of a coffee maker was $40.66. Assuming a sales tax rate of 7 percent, what was the marked price of the coffee ma

Elena-2011 [213]

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3 years ago

Can someone please help me

34kurt

If the first term was n=0, it would be -27+xn (with x being a number). Seeing how it goes down by 9 every time, we would have -27-9n. However, there is no option for this, so it would be wrong and we move on to the first number being x=-1. Since it goes down by 9 every time you go up, if you go down to x=0 you add 9 to go to -18. The pattern is still there, so it's -18-9n

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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: Newton's Law of Cooling 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.

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3 years ago

ONLY DO PART C PLS I NEED THE ANSWER ITS DUE TODAY ILL GIVE BRAINLIEST

coldgirl [10]

Answer: 370

Step-by-step explanation:

ok so since 40 people is 10% then the 15% is 60.40% is 160 people and last 35% 110 so added all together is 370(this may be wrong if so i am so sorry)

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3 years ago