Answer:
The amount invested are $2600 and $11400 respectively
Step-by-step explanation:
<em>Let the first amount be x</em>
Given:
(First Investment)
Principal (P1) = x
Rate (R1) = 4.5%
Time (T) = 1 year
(Second Investment)
Principal (P2) = 4x + 1000
Rate (R2) = 6%
Time (T) = 1 year
Income = $801
Calculating the income from the first investment;
Substitute values for P1, R1 and T
Calculating the income from the second investment;
Substitute values for P2, R2 and T
So:
Multiply through by 100
Collect Like Terms
Divide through by 28.5
Recall that; the second invest
Amount Invested = 4x + 1000
This gives
Hence;
<em>The amount invested are $2600 and $11400 respectively</em>
For this case, we must make a rule of three, to find the percentage of the k-40 found in the sample found.
1.3 ----------> 100%
1 -------------> x
Where "x" represents the percentage of k-40 present in the sample found.
Rounding off we have:
76.92%
ANswer:
Option A
Answer: -9
18/x = -2
⇔ x = 18/(-2)
⇔ x = -9
Step-by-step explanation:
n(A) is the number of elements is A, sometimes written |A|. I count 7. n(A)=7
13 is among the elements of A, so 13 ∈ A is TRUE
26 is among the elements of A, so 26 ∉ A is FALSE
10 isn't in A, so 10 ∉ A is TRUE
1 plus 1 equal 2 because your just adding