3:
You're finding the area of two shapes, a square, and a quarter of a circle.
So
A=As+Ac/4
A=Lw+πr²/4
A=(6)(6)+(3.14)(6²)/4
A=64.26 m²
4:
Line LKJ is a straight line, so <LKJ =180°
<LKJ=<JKH+<HKL
180=78+4x+2
180=80+4x
100=4x
25=x
<HKL=4x+2
<HKL=4(25)+2
<HKL=102°
7.
I: when no unit, assume radians
II: hmm, 0 to pi/2 radians is 1st quadrant, pi/2 to pi is 2nd, pi to 3pi/2 is 3rd and 3pi/2 to 2pi is 4th
pi/2<1.57<pi so it is in 2st quadrant
III:
cos is negative here because cos is the x axis
IV. no because the value of cos(1.75rad) should be negative
8.
I: from 0 to 90 is 1st
from 90 to 180 is 2nd
from 180 to 270 is 3rd
from 270 to 360 is 4th
so it is in 2nd quadrant
II: sin is positive here because sin is the y axis
III: sin should be positive here so a negative value is not reasonable
IV: maybe she put 125 without putting the degrees and the calculator thought that it was radians
10% of 30 is 3, which means it rained 3 days.
30-3 = 27 days NO rain
Answer:
5 faces
Step-by-step explanation:
4 triangle faces + 1 square base face = 5 faces in total