Answer:
F (x) = {32x+4, 0 < x < 10
25x + 9, x _> 10
Step-by-step explanation:
The one I guessed was wrong and it said that the one I put up above is the correct answer :)
Answer:
= 40/3 = 13 1/3
Step-by-step explanation:
8/1 ÷ 3/5 = 8/1 x 5/3
8 x 5 = 40
1 x 3 = 3
= 40/3 = 13 1/3
Answer:
27
Step-by-step explanation:
3^2(2^3+4)/2^2
3^2(8+4)/2^2
3^2(12)/2^2
9(12)/4
108/4
27
Answer:

Step-by-step explanation:
we are given half-life of PO-210 and the initial mass
we want to figure out the remaining mass <u>after</u><u> </u><u>4</u><u>2</u><u>0</u><u> </u><u>days</u><u> </u>
in order to solve so we can consider the half-life formula given by

where:
- f(t) is the remaining quantity of a substance after time t has elapsed.
- a is the initial quantity of this substance.
- T is the half-life
since it halves every 140 days our T is 140 and t is 420. as the initial mass of the sample is 5 our a is 5
thus substitute:

reduce fraction:

By using calculator we acquire:

hence, the remaining sample after 420 days is 0.625 kg
Answer:
x = 13
39° and 51°
Step-by-step explanation:
Angles in a triangle add up to 180 degrees.
This is a right angle triangle, so one side has a size of 90 degrees.
3x + 4x - 1 + 90 = 180
7x + 89 = 180
7x = 91
x = 91/7
x = 13
Put x as 13 to work out the size of the angles.
3(13) = 39
4(13) - 1
52 - 1 = 51