Answer:
1.
( in this inequality, the time can be less than or equal to 45, but no more than 45)
2.
(Mario's height is more than 60.)
3.
(More than 8000 fans attended.)
Answer:
79
Step-by-step explanation:
Answer:

Step-by-step explanation:
The equation of the graph can be obtained using the formula:

From the graph, the y-intercept is -1 and the x-intercept is 2
We substitute these values to get:


This implies that;

Or

The function notation is

Answer:
343 : 729
Step-by-step explanation:
A cube is made up of 6 square faces. If each face has a side length of a, we can find the surface area of that cube with the formula
, since we'll have 6 faces with area a². Let's call the edge length of the first cube a and the edge length of the second cube b. The ratio between their surface areas is then 6a² : 6b², or simply a² : b². If we compare this to our given ratio 49 : 81, we can see that a² = 49 and b² = 81, or, square rooting both equations, a = 7 and b = 9.
The volume of a cube with a side length a is a³, so the ratio between our cubes here must be a³ : b³. Using the values for a and b we just found, this ratio becomes 7³ : 9³, which we can simplify to 343 : 729.