Answer:
The explanation is given below.
Step-by-step explanation:
Given for a triangle to be obtuse only one of the angles must be shown to be obtuse but for a triangle to be acute all three angles must be shown to be acute.
According to Pythagoras theorem for a right angled triangle which has one angle of 90° rest of two are acute.

Hence, by Pythagorean inequality

which gives the triangle is acute.
Hence, one acute angle with the Pythagorean inequalities theorem shows that the triangle is acute.
Answer:
-12
Step-by-step explanation:
For a 4 by 4 cube, he needs 4 rows 4 high for 16 cubes in each row.
The back row is 3 x 4 = 12, so he needs 4 more for the back row,
The 3rd row he has 8, so needs 8 more.
The 2nd row he has 4 so needs 12 more,
The first row he has 2 so will need 14 more.
Total needed: 4 + 8 + 12 + 14 = 38 more cubes.
Answer:
Decay
Step-by-step explanation:
Here, we want to know the kind of exponential function that the problem illustrate
From the question, we are told of a depreciation by 30%’per year
what this mean is that it loses its value at a rate of 30% per year
Hence, we can conclude that the change in value in the next year is 30% less than what we had the year before it
So in this instance, we can conclude that what we have is a decay since we are talking about a loss in value
Do you mean something like y=my+b?