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sammy [17]
2 years ago
8

PLEASE HELPPP ASAP!!! Imagine that you have been asked to write a letter to a 7th grader. Using academic vocabulary and 5-7 comp

lete sentences, write a letter teaching a 7th grader about something you have learned in 8th grade Math this year.
Mathematics
2 answers:
Snowcat [4.5K]2 years ago
6 0

Answer:

Step-by-step explanation:

Address of the sender,

City- Pincode

Date

Dear (Name),

Hope you're doing well,

I enjoyed 8th grade math this year. It was really fun to learn new things. (Write some things you learnt and whether or not you liked them). I hope that when you reach 8th grade, you enjoy Math too.

Sincerely,

(Your Name)

victus00 [196]2 years ago
4 0

Answer:

12mn

Step-by-step explanation:

21mn21mn12mn12mn12mn21mn21mn21mn12mn

yw

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Step-by-step explanation:

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3 years ago
the half-life of strontium-90 is approximately 29 years. how much of a 500 g sample of strontium-90 will remain after 58 years​
Yuliya22 [10]

Answer:  125 g

<u>Step-by-step explanation:</u>

A = P_o\cdot e^{kt}\\\\\text{First, use the given information to find k:}\\\\\bullet A=\dfrac{1}{2}P_o\\\\\bullet k = unknown\\\\\bullet t=29\text{ years}\\\\\dfrac{1}{2}P_o=P_o\cdot e^{k(29)}\\\\\\\dfrac{1}{2}=e^{k(29)}\qquad divided\ both\ sides\ by\ P_o\\\\\\ln\bigg(\dfrac{1}{2}\bigg)=ln\bigg(e^{k(29)}\bigg)\qquad applied\ ln\ to\ both\ sides\\\\\\ln\bigg(\dfrac{1}{2}\bigg)=29k\qquad simplified-ln\ and\ e\ cancel\ out\\\\\\\dfrac{ln\bigg(\dfrac{1}{2}\bigg)}{29}=k\qquad divided\ 29\ from\ both\ sides\\\\\\-0.0239=k

\text{Now, use the following in the equation to solve for A:}\\\\\bullet A=unknown\\\bullet P_o=500\\\bullet k=-0.0239\\\bullet t=58\text{ years}\\\\A=500\cdot e^{(-0.0239)(58)}\\\\.\quad=500\cdot e^{-1.386}\\\\.\quad=125

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3 years ago
Read 2 more answers
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