Evalúe la expresión A / (1–cos x), en un valor de x cercano a 0°. ¿Cómo podría evitar la resta de dos números casi iguales en el denominador?

answer: 4  

the square root of 16 is 4. it is a very simple mathematic concept. a square root when a number multiplied by itself will result in a number. here, the number 16 comes when 4 is multiplied by 4. hence the square root of 16 is 4. you can always figure out a square root by the inverse operation of squaring.  

option c is correct.

step-by-step explanation:

the rule regarding the sides of triangle is:

(length of longest side)^2 = square of sum of other two sides.

the sides given are:

6, 10 and 8.

applying the rule we will get:

(10)^2 = (6)^2 + (8)^2

100 = 36+64

100 = 100

so, her answer is incorrect.

no, she should have added 6^2 and 8^2 and compared that to 10^2.

so, option c is correct.

answer: 3 times more

step-by-step explanation: so the polar bear weighs 3 times more   than the black bear. so the grizzly weighs twice as much as the black bear. a good hint for word problems is to draw the problem out

answer is d.

l.a. = 791.7 ft2;  

s.a. = 1,244.1 ft2

hope you got it : d