Estimate 23,945 + 46,718 by rounding to the highest place value.

The highest place value is in the ten thousand for both of these numbers. Let's round the two numbers first, and then we will add them. Let's round 23,945. So, we need to round to the ten thousand place, so we look at the number behind it (3) and act accordingly.
Remember:
5 or more? Raise the Score
4 or less? Let it Rest
We are looking at the bolded number: 23,945. This number is 4 or less, so we let it rest. So, the new rounded number is 20,000. 
Now let's look at 46,718. So, we need to round to the ten thousand place, so we look at the number behind it (6) and act accordingly. Look at the bolded number: 46,718. This number is 5 or more, so we raise the score. The new rounded number becomes 50,000.
Now, all you have to do is add 20,000+50,000, which is 70,000. Hope this helped!

222.76 feet

Step-by-step explanation:

This question can be solved using one of the three trigonometric ratios. The height mentioned is 90 feet and the angle of depression is 22 degrees. It can be seen that the required distance is given by x feet. This forms a right angled triangle, as it can be seen in the diagram. The perpendicular is given by 90 feet, the base is the unknown, and the angle of 22 degrees is given, as shown in the attached diagram. Therefore, the formula to be used is:

tan θ = Perpendicular/Base.

Plugging in the values give:

tan 22 degrees = 90/x.

x = 90/tan 22.

x = 222.76 feet (to the nearest hundredth).

Therefore, the building is 222.76 feet away from the sculpture!!!