3 years ago

Brainly.com

Mathematics

1 answer:

fenix001 [56]3 years ago

4 0

The answer is b for brip

You might be interested in

Please help me with this question. Question C (i) and (ii)

GenaCL600 [577]

Answer:

idk

hahahahahaha

Step-by-step explanation:

8 0

3 years ago

six college buddies bought each other christmas gifts. they spent $261.12 $120.52 $186.23, $298.97 $171.55 $263.93

kykrilka [37]

The answer is 1,302.32

3 0

4 years ago

Read 2 more answers

The curves r1(t) = 4t, t2, t3 and r2(t) = sin(t), sin(5t), 2t intersect at the origin. find their angle of intersection, θ, corr

san4es73 [151]

First get the tangent vectors by differentiating r1 and r2
$r_1 '(t) = (4,2t,3t^2) \\ \\ r_2'(t) = (cos (t), 5 cos(5t), 2)$
Evaluate at t=0
$r_1' = (4,0,0) \\ \\ r_2' = (1,5,2)$

Use identity for angle between 2 vectors:
$u*v = |u| |v| cos \theta$

Evaluate dot product and unit vectors:
$u*v = (4,0,0)*(1,5,2) = 4 \\ \\ |u| = \sqrt{4^2 +0^2+0^2} = 4 \\ \\ |v| = \sqrt{1^2 + 5^2+2^2} = \sqrt{30}$

Sub into identity and solve for theta:
$4 = 4 \sqrt{30} cos \theta \\ \\ cos\theta = \frac{1}{\sqrt{30}} \\ \\ \theta = 79.48$

Answer:
Angle of intersection is about 79 degrees.

5 0

4 years ago

Matthew is a salesman and earns commission on merchandise he sells. Last week he sold $7000 in merchandise. How much money does

MariettaO [177]

Answer:

I think the commission amount is $210

5 0

4 years ago

Read 2 more answers

I need help with this question

elena-s [515]

Answer:

Step-by-step explanation:

by looking how many of the number fit into the category of minutes

8 0

3 years ago