Simply divide 650/676=.9615 or 96.15%. So there was 3.85% error
The commutative property of 9+8=17 is 8+9=17 because the commutative property states that it doesn't matter the order of the number but as long as u get the same answer.
The value of the given equation is –0.37458.
Solution:
Given equation is:

Let us first find the values.
The value of tan 1.1 = 1.96475
The value of tan 4.6 = 8.86017
Substitute these values in the given equation.




= –0.37458

Hence the value of the given equation is –0.37458.
B;
$6.00 lb + 15% = 6.00 x 1.15 = $6.90
$6.90 x 2.6lbs = $17.94
C;
New price is $.90 more.
3.5 x .90 = $3.15 more
Thats easy the answer is b