Answer:26.44%
Step-by-step explanation:
Answer:
C. Two-tailed paired t-test.
Step-by-step explanation:
Since Dr. Hernandez takes 30 samples from a contaminated lake and 30 fish from a pristine lake, he should use a two-tailed t-test.
Paired t-tests describe tests used to compare the means of two samples when each observation in one sample can be paired with an observation in the other sample. Dr. Hernandez can certainly pair the samples and observe the differences, so the answer is C. Two-tailed paired t-test.
Hope this helps!
Answer:
1432 years
Step-by-step explanation:
A(t) = I(0.5)^t/t1/2
Where t1/2 = half life = 1660
Final amount, A(t) = 0.55 of its original amount =. 0.55I
Hence, we have
0.55I = I(0.5)^t/1660
Take the log of both sides
Log(0.55) = log(0.5)^t/1660
t/1660 = log(0.55) / log(0.5)
t/1660 = 0.8624964
t = 0.8624964 * 1660
t = 1431.7441
t = 1432(nearest whole number)
To find the prodcut of 12 and 3/4, you do 12*3/4
12*3/4 (multiply the numerators with each other)
36/4 (divide numerator and denominator by 4)
=9
Since 9 is less than 12, the product of 12 and 3/4 is less than 12
Hope this helps
Step-by-step explanation:
Slope of the given line is 3, so slope of the perpendicular line is also 3.
using pt slope form,
y+3=3(x-6)
y+3=3x-18
y=3x-21