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liberstina [14]
3 years ago
8

A drill is used to dig down into the earth. After 2 hours, the drill is 12 meters below the surface. After 5 hours, the drill is

30 meters below the surface. Which equation represents the depth of the drill in meters, y, after ​x hours of drilling?
Mathematics
1 answer:
Zanzabum3 years ago
4 0
No idea to that answer sorry
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When using a one-sample t-procedure to construct a confidence interval for the mean of a finite population, a condition is that
Advocard [28]

Answer:

C. The degree of dependence among the observation is negligible.

Step-by-step explanation:

The conditions for performing a t-procedure when constructing a t-interval are;

1) The samples observation should be independent of each other

2) The use of a random sample or experiment for the procedure

3) Ensure the normality of the data of the dependent variable

Given that surveys usually involve sampling without replacement from a population which is finite can not be taken as independent Bernoulli trials however, it is allowable to still consider samples independent when they are less than 10% the size of population

Therefore, the reason for the condition is to ensure that the population to sample size ratio is large enough and that the degree of dependence among the observation is negligible.

3 0
3 years ago
the least common multiple of two numbers is 84, and one of the numbers is 5 less than the other number. what are the numbers?
uysha [10]
X (x-5)=84
{ x}^{2}  - 5x = 84 \\
{x}^{2}  - 5x - 84 = 0
then you have to factor
7 0
3 years ago
The square of a number exceeds that number by 12. What are the two possible solutions?
vagabundo [1.1K]
X^2=x+12
minus x+12 both sides
x^2-x-12=0
factor
(x-3)(x+4)=0
set each to zero

x-3=0
x=3

x+4=0
x=-4

x=3 or -4

answer is first one
3 0
3 years ago
Read 2 more answers
While staying in Rome, Italy, you decide to take a trip to three other cities: Milan, Genoa, and Padua. The following table deta
enot [183]

Answer:

C 244

Step-by-step explanation:

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8 0
3 years ago
Find the dot product of two vectors if their lengths are 4 and 1/2 and the angle between them is π/4.
Luba_88 [7]
The dot product is a technique that solves the resultant vector through the use of matrices. Since we have no coordinates, we can't use matrices. However, we can still solve the resultant vector (red line) through cosine law. The solution is as follows:

R² = 4² + (1/2)² - 2(4)(1/2)(cos π/4)
R = √13.42
R = 3.66

The resultant vector has a magnitude of 3.66.

4 0
3 years ago
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