Answer:
t=0
Step-by-step explanation:
r=<+1,>
by differentiating the r vector component by component
r' = <2at, 1>
Two vector are orthogonal when the dot product between them is zero, so:
r'·r=0
<+1,>·<2at, 1>=2+2at+t=0
common factor
t(+2a+1)=0
Then, the only real value for t is zero.
-> t=0
3 : 4 = 2700 : 3600
sum the parts of the ratio : 3 + 4 = 7
divide 6300 by 7 to obtain 1 part
= 900 ← 1 part
3 parts = 3 × 900 = 2700
4 parts = 4 × 900 = 3600
note that 2700 + 3600 = 6300
Answer:
7/4
Step-by-step explanation:
since 1=4/4
4/4+3/4=7/4
Answer:110 degrees
Step-by-step explanation:
L1 and L2 are parallel so the angle above angle 1 is 70 degrees too. Then the angle that is right next to that 70 degrees is 110 because a straight line equal 180 degrees. And whatever angle that is diagonal from angle 1 is the same degrees. So, since it's 110 degrees diagonal from angle 1 then angle 1 is also 110 degrees.