Answer:
-75 m
Step-by-step explanation:
Use sea level as the reference point.
Initially the position is -50 m.
If the submarine goes up 15 m, then its new position is (-50 + 15) m, or -35 m.
If the sub now descends 40 m, its new position is (-35 - 40) m, or -75 m
<h3>
Answer: k = 6+10x</h3>
=======================================================
Work Shown:
The result is in the form 
with k = 6+10x
------------------------
Explanation:
First we need to get everything as an exponential expression with a base 2.
We rewrite 64 as 
and 4 as 
in the second step.
In the third step, I used the rule 
which says to multiply the exponents together. That's how I went from 
to 
. Then the 2*5x in the exponent becomes 10x.
To wrap things up, I used the rule 
which says to add the exponents when we multiply stuff of the same base together.
Convert the fraction to a decimal:
1/25 = 0.04
Multiply by 100 to get the percent:
0.04 x 100 = 4%
Answer:
<h3>12</h3>
Step-by-step explanation:
The cardinal number of a set is the number of element in the set. Given the set A = {{3, 5, 7, ... 25}}, you can see that the elements of the set are odd numbers from 3 to 25. Writing out the full set;
A = {{3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25}}
Counting the total number of element in the set, you will see that there are only 12 elements in the set. Hence the cardinal number of the set is 12 i.e n(A) = 12
