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quester [9]
3 years ago
8

if you are given 80 grams of a radioactive element and told that its half-life is 10 years. How much will be left of the substan

ce after 20 years.​
Mathematics
1 answer:
Phantasy [73]3 years ago
4 0

Answer:

20 grams

Step-by-step explanation:

20 years is 2 half lives

1/2 * 1/2 = 1/4

1/4 * 80 = 20 grams

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There are six wires which need to be attached to a circuit board. A robotic device will attach the wires. The wires can be attac
lesya692 [45]

Answer:

S=720

Step-by-step explanation:

From the question we are told that

Six wire are attached to a circuit board

Generally using multiplication rule

Let number of possible sequence be given as S

Mathematically  

S=6! =6*5*4*3*2*1=720

Therefore

Number of possible sequence S=720

5 0
3 years ago
What is the slope of the line in the graph?
alexandr1967 [171]

Answer:

slope =  \frac{(y - y)}{x -x}  \\  =  \frac{1 - 0}{0 + 1} =1 \\ you \: take \: two \: points \: a(0)(1) \\ b( - 1)(0) \\ then \: the \: slope \: is \: 1

6 0
2 years ago
Suppose the interval ​[negative 3−3​,negative 1−1​] is partitioned into nequals=44 subintervals. What is the subinterval length
Kobotan [32]

Answer: Δx​ = 0.5

Step-by-step explanation:

We have the interval:

​[−3​, −1​]

and we partition it into 4 equal intervals.

first, the range of our interval is equal to the difference between the extremes, this is:

-1 - (-3) = -1 + 3 = 2

Then, if we divide it into 4, we have 4 segments with a range of:

2/4 = 0.5

Then the subinterval delta is 0.5, and the 4 intervals are:

​[−3​, -2.5​],  ​[−2.5, −2​],  ​[−2​, −1.5​],  ​[−1.5, −1​]

6 0
3 years ago
1.4t−0.4(t−3.1)=5.8<br><br> SOLVE FOR Y
VladimirAG [237]
There is no y in this question, however we can solve for t.

1.4t - 0.4(t - 3.1) = 5.8
1.4t - 0.4t + 1.24 = 5.8
t + 1.24 = 5.8
t = 4.56
3 0
3 years ago
NEED HELP PLEASE!!!!!!!!!!!!
belka [17]

Answer:

The answer is B. hope this helps

4 0
3 years ago
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