Textbook Page 80 Question 21

 A baseball diamond is square area of about 750m2. 

 what is the distance from first to second base. Give 

 your answer to the nearest tenth of a metre.

The distance from first base to second base is 27.4m.

Textbook: Page 81: Question 33

Textbook 79, Question 19

A square picture with an area of 100cm² is mounted on a square piece of matting. The matting has 2.5 times the area of the picture. If the picture is centered on the matting, what width of matting is visible around the outside of the picture. Give your answer to the nearest tenth of a centimeter.

So we know that the picture in the middle is 100cm²

So I if we find out what 100cm² x 2.5 is we get 250. Now we need to find the square root of 250 which we get 15.8cm.

 The space between the 10cm and 15.8cm line is 5.8cm
if we move the square in the middle to the very center, that is like splitting that space in half, so 5.8÷2 you get 2.9cm

Textbook: Page 70 Question 22

22. Taj has three scoops for measuring flour. The largest scoop hold 2 1/2 times as much as the smallest one. The middle scoop holds 1 3/4 as much as the smallest one.

Describe two different ways in which Taj could measure each of the following quantities. He can use full scoops only.

a) 3 1/4 times as much as the smallest scoop holds

b) 1/2 as much as the smallest scoop holds

                                                                                                                                                      

Before we can find out what what the other cups are we need to find out what the smallest cup is.

Smallest cup = X.... So 2 1/2 ÷ X = 2 1/2 or 1 3/4 ÷ X = 1 3/4.
X = 1
Smallest cup = 1
Large cup = 2 1/2 or 5/2
Medium cup = 1 3/4 or 7/4

ANSWER..
a) First way: 1 large scoop + 1 medium scoop - 1 small scoop

            
Second way: 2 large scoop - 1 medium

ANSWER
b) First Way: 1 large scoop - 2 small scoop

Second Way: 2 medium scoops - 3 small scoop