Eoin plans to purchase 6.50 pounds of cheese that costs $4.75 per pound. he used the following steps to estimate the cost.
step 1: round 6.50 pounds up to 7.
step 2: round $4.75 up to $5.00.
step 3: multiply 5 by 7 to get 35.
step 4: conclude that the cost will be just over $35.00.
in which step does eoin make a mistake?
a. in step 1, he should have rounded the weight down to 6 pounds.
b. in step 2, he should have rounded the cost down to $4.00.
c. in step 3, he chose the wrong operation to calculate cost.
d. in step 4, he should have concluded the cost would be under $35.00

Eoin make a mistake in the step 4 i.e  
Eoin conclude that the cost will be just over $35.00.  


Option (D) is correct .

Step-by-step explanation:

In the first step  
Eoin rounded up the 6.50 pounds of cheese to 7 .

In the second step  
Eoin rouunded up the $4.75 per pound of cheese to $5.00 .

In the third step the multiplication of the 7 pound of cheese to $5.00 (cost per  pound of cheese ) is 35 .

There is the mistake in the fourth step .

Exact cost of the 7 pound of cheese is 35 not over $35 .

Therefore the  
Eoin  should have concluded the cost would be under $35.00   .

Option (D) is correct .

on friday there were 15 birds

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl