35.7
half-lives of radioactive elements
radioactive element element's half-life (billion years) element it decays into
lutetium-176
halfnium-176
potassium-40
11.93
argon-40
rhenium-187
423
osmium-187
rubidium-87
48.8
strontium-87
thorium-232
lead-208
uranium-238
lead-206
graph it on a separate sheet of paper, draw a bar graph showing the half-lives of the radioactive elements in the chart.
be sure to label your graph's x- and y-axes, and give your graph a title
analyze it
1. which element has the longest half-life? the shortest?
4. can radiocarbon dating be used to date most rocks?
explain why or why not.
2. which radioactive element is the source for lead-208?
5. suppose scientists used radioactive dating to determine
that rocks at a dig site were 3 million years old. what would
this data suggest about the age of any fossils found at the
site? explain your answer.
3. how many elements in the chart have a half-life of less
han 15 billion years?

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.

step-by-step explanation:

i found the koficent of the linear function and i foun c acordind to the strict formula y=kx+c and then i took 2 as an x and replacet it on the formula i found and then foun the y

21

jk it's 20

step-by-step explanation:

answer: 4 (:

step-by-step explanation: