Suppose that 1/2 of the children in preschool are scared of snakes, 1/3 are scared of spiders, and 1/12 are scared of snakes and spiders. 1. what fraction of those who are scared of spiders are also scared of snakes? a) 1/2 b) 1/3 c) 1/4 d) 1/6 2. what fraction of those who are scared of snakes are also scared of spiders? a) 1/2 b) 1/3 c) 1/4 d) 1/6

1. C)

2. D)

Step-by-step explanation:

We know that:

1/3 is afraid of spiders

1/12 fears spiders and snakes

Then, the proportion of children who fear spiders and also snakes is calculated as:

Option C)

Of the 1/3 of children who fear spiders, 1/4 of them also fear snakes.

Now:

1/2 is afraid of the serientes

1/12 fears spiders and snakes

Then, the proportion of children who fear spiders and also snakes is calculated as:

Option D)

Of the 1/2 of children who fear snakes, 1/6 of them also fear spiders

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.  

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40