(2x10)+(4x1)+(3x1/10)+(5x1/100)+(7x1/1000)
1/10,1/100,1000 are fractions
Answer:
We use cosine rule also called cosine law which states
c^2=a^2+b^2-2abcosC
given
a=8cm, b=7cm, c=9cm cos C?
9^2=8^+7^2-2*8*7 cos C
expand
81=64+49-112 cos C
like terms together
81-113=-112 cos C
-32=-112cos C
multiply both sides by -1
32=112cos C
divide both sides by 112
32/112=cos C
cosC=0.2857
find cos inverse of 0.2857
angle C= 73.40
Answer:
It is 0.873 but rounded to hundredth is 0.87
Step-by-step explanation:
expression: (3.24-3/8+7/9-0.15) divided by 4
Solve: (3.24+7/9-3/8-0.15) divided by 4
= (3.24+0.78-0.375-0.15) divided by 4
=3.49/4
-0.873 = 0.87 to the nearest hundred
degress celcius