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umka21 [38]
3 years ago
12

What is the reference angle for -150 degrees

Mathematics
1 answer:
ValentinkaMS [17]3 years ago
6 0

Answer: 330

Step-by-step explanation:

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The decay rate for a radioactive isotope is 9.29.2 percent per year. find the half-life of the isotope. round to the nearest ten
Oxana [17]
Exponential decay is given by the equation

F = P(1 - r)^t

0.5 = 1(1 - 0.092)^t

0.5 = (0.908)^t

log 0.5 = log (0.908)^t

log 0.5 = t * log 0.908

t = (log 0.5)/(log 0.908)

t = 7.18

Answer: 7.2 years
4 0
2 years ago
A complex number z_1z 1 ​ z, start subscript, 1, end subscript has a magnitude |z_1|=6∣z 1 ​ ∣=6vertical bar, z, start subscript
aliina [53]

Answer:

The answer is "\bold{9.19- 9.19\ i}"

Step-by-step explanation:

When the value of z_1 has the following properties:

\to |z_1| =13

\theta = 315^{\circ} \\\\ = 1.75 \pi\ \ \ \ \ \ \ \ \ \ \ \ \ \  \ _{where} \ \ (\pi = 180^{\circ})

Calculating the value of z_1 :

= 13 \times [ \cos(1.75 \pi ) + i \sin(1.75 \pi) ] \\\\=  13 \times[\cos(1.75 \pi - 2\pi ) + \ i \sin(1.75 \pi - 2\pi )]\\ \\= 13 \times [\cos(-0.25 \pi ) +\  i \sin(-0.25 \pi) ]\\\\= 13 \times [0.707106781 - 0.707106781]\\\\ =9.19 - 9.19\ i \\\\

3 0
2 years ago
What numbers are mulitply and equals negative 30 and when add equals to negative 25
timofeeve [1]
This is impossible without getting a never ending decimal somewhere between 1.14 and 1.15.
3 0
3 years ago
5:15 as a equivalent ratio
natima [27]

Answer:

1:3

Step-by-step explanation:

5 is 1/3 of 15

hope this helps! :)

3 0
3 years ago
U
MariettaO [177]

Answer:

1.The ratio of dogs to cats is 3 to 4

2. For every 3 dogs there are 4 cats.

Step-by-step explanation:

5 0
2 years ago
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