The half-life is a substance is 375 years. If 70 grams is present now, how much will be present in 500 years?

Use the formula pictured

27.76 grams will be present in 500 years

Step-by-step explanation:

The given formula is , where A is the value of the substance in t years, and is the initial value

∵ The half-life is a substance is 375 years

- Substitute A by and t by 375 to find the value of k

∴

- Divide both sides by

∴

- Insert ㏑ in both sides

∴ ㏑( ) = ㏑ ( )

- Remember ㏑ ( ) = n

∵ ㏑ ( ) = 375 k

∴ ㏑( ) = 375 k

- Divide both sides by 375

∴ k ≈ -0.00185

∴  

∵ 70 grams is present now

- That means the initial value is 70 grams

∴ = 70

∵ The time is 500 years

∴ t = 500

- Substitute the values of and t in the formula

∵

∴ A = 27.76

∴ 27.76 grams will be present in 500 years

connie < felicia < stew

step-by-step explanation:

stew:

we need to find the slope

m = (y2-y1)/ (x2-x1)

    = (2650-795)/(10-3)

    = 1855/7

265 words per minute

connie:

we need to find the slope

m = (y2-y1)/ (x2-x1)

we have two points (0,0) and (4,800)

m = (800-0)/(4-0)

  m = 800/4

    200 words per minute

felicia:

260 words per minute

200< 260 < 265

connie < felicia < stew

konichiwa~! my name is zalgo and i am here to answer your anime-related question today. more than likely, kirishima would kill izuku, marry mino and kiss momo. all of this would be my opinion by the way. (and i am also a weeb lol)

i hope this you! : d

stay and stay proud! " - zalgo

(and do you think you can mark me as brainliest? i'd greatly appreciate it! arigato~! )