Answer: -7
Step-by-step explanation:
The equation is in slope-intercept form (y=mx+b), where m is the slope and b is the y-intercept
Therefore, the m value is -7 and it is the slope
This is C. cos Z = sin (90 - Y)
Answer: 5/9 of a mile
Step-by-step explanation:
2/6 + 2/9
3/9 + 2/9
5/9
Part A:
The amount of substance left of a radioactive substance with a half life

and amount of initial substance

is given by

Given that th<span>e
isotope samarium-151 has a half-life of
around 96.6 years and the rock contains 5 grams of samarium-151 when it
reaches its closure temperature, and it contains 0.625 grams when it is
discovered.
</span><span>The time since the rock reached its closure temperature is obtained as follows:

Therefore, </span>t<span>he time since the rock reached its closure temperature is 289.8 years.
Part B:
Given that the </span><span>rock
contains 5 grams of samarium-151 when it reaches its closure
temperature, and it contains 0.625 grams when it is discovered. The number of grams of europium-151 when the rock was discovered is 5 - 0.625 = 4.375</span>
Answer:
d) 1.5 or 1 1/2 or 3/2 e) 1.6 or 1 3/5 or 8/5 f) 3.75 or 3 3/4 or 15/4