The half-life of the element is 13 minutes, which means after 13 minutes, any starting amount decays to half. So element X decays with a rate k such that
Solve for k :
Now, we solve for t such that
Mean: 11
Median: 9
Mode: 7
Mean is when you add up all of the numbers, then you take the sum you get and divide by the amount of numbers you have. So in this case, it’d be 154 (the sum) divided by 14 (the amount of numbers you have).
Median is when you put all of your numbers in ascending order and then find the middle number. In this case, the amount of numbers we had were even, so the middle numbers were 8 and 10. In between of these two numbers, is the number 9. So as a result, 9 is your answer.
Mode is the number that you see the most in a set of number. In this case, 7 is repeated 3 times, unlike other numbers, which happens to be the most. So, 7 is your answer for the mode.
0.4x30 +3= 15
700/15= 46...
46x30=1380
46x15=690
700-690=10
10/0.4=25
25+1380=1405(ans)
Answer:
Angle "c" would be 9 degrees (a very small angle!)
Step-by-step explanation:
In a triangle, all of the angles must equal 180 degrees.
57, the measure of angle "a", plus 114, the measure of angle "b", would equal 171 degrees.
So, 180 - 171 = 9, which would be the value of the remaining angle "c"
8. Since A F is perpendicular to J K, you know angles J A F and K A F are congruent (both are right angles). Since A F bisects J K, you know the lengths of J A and K A are the same. Side A F is incident to both triangles, and of course the lengths A F = A F. So we have two side-angle-side triangles, and by the SAS postulate we have triangles J F K and K F A congruent to one another.
9. Yes. The corresponding sides in both triangles have the same lengths. (S K to K F; S J to F J; J K to itself) The claim then follows from the SSS postulate.