An element with mass 670 grams decays by 21.8% per minute. How much of the element is remaining after 15 minutes, to the nearest 10th of a g

Question

An element with mass 670 grams decays by 21.8% per minute. How much of the element is remaining after 15 minutes, to the nearest 10th of a gram?

in progress 0
Raelynn 1 day 2021-10-12T12:00:41+00:00 2 Answers 0

Answers ( )

    0
    2021-10-12T12:02:08+00:00

    Answer:

    16.76\ g

    Step-by-step explanation:

    In this problem we have a exponential function of the form

    y=a(b^x)

    where

    x is the time in minutes

    y is the mass of the element in grams

    a is the initial value or y-intercept

    b is the base

    r is the rate

    b=(1+r)

    we have

    a=670\ g

    r=-21.8\%=-21.8/100=-0.218

    b=1-0.218=0.782

    substitute

    y=670(0.782^x)

    so

    For x=15 min

    substitute in the exponential equation

    y=670(0.782^15)

    y=16.76\ g

    0
    2021-10-12T12:02:29+00:00

    Answer: 16.8

    im doing the delta math

Leave an answer

Browse
Browse

27:3+15-4x7+3-1=? ( )