Answer:
The best estimate for 43x78 is 40x80
Step-by-step explanation:
43 rounded to the nearest ten is 40.
78 rounded to the nearest ten is 80.
The answer to 40x80 is 3200
Solution:
Given:

Using the simple interest formula,

Therefore, the simple interest is $960.
Answer:

Step-by-step explanation:
The axis of symmetry can be calculated using the formula:

First we must determine a and b from the quadratic:
. This is in standard form, with the highest power first in descending order.
Standard form is also: 
If we compare this to the quadratic given, we can conclude that:

Substitute the values for a and b into the formula.

Multiply in the denominator.

Divide.

This can also be determined from the graph. It is the x-coordinate of the vertex or the maximum/minimum. It divides the quadratic into 2 symmetrical halves.
Answer: b. 1/2.
Step-by-step explanation: 3/7 in decimal form is 0.42, which is close to 1/2 (0.5) than to 0.
Answer:
576 Sq.units
Step-by-step explanation:
Multiply all of the numbers together