Human reproductive system. The human reproductive system usually involves internal fertilization by sexual intercourse. During this process, the male inserts his penis into the female's vagina and ejaculates semen, which contains sperm. ... Human infants are nearly helpless and require high levels of parental care.
Answer:
10
Step-by-step explanation:
P(black bean soup) = cans of black bean / total = 6/12 =1/2
out of the next 20
20 *P(black bean)
20 * 1/2 = 10
Answer: c
Step-by-step explanation:
![\mathrm{gcd}(a,b)=9\implies9\mid a\text{ and }9\mid b\implies9\mid a+b](https://tex.z-dn.net/?f=%5Cmathrm%7Bgcd%7D%28a%2Cb%29%3D9%5Cimplies9%5Cmid%20a%5Ctext%7B%20and%20%7D9%5Cmid%20b%5Cimplies9%5Cmid%20a%2Bb)
which means there is some integer
![k](https://tex.z-dn.net/?f=k)
for which
![a+b=9k](https://tex.z-dn.net/?f=a%2Bb%3D9k)
.
Because
![9\mid a](https://tex.z-dn.net/?f=9%5Cmid%20a)
and
![9\mid b](https://tex.z-dn.net/?f=9%5Cmid%20b)
, there are integers
![n_1,n_2](https://tex.z-dn.net/?f=n_1%2Cn_2)
such that
![a=9n_1](https://tex.z-dn.net/?f=a%3D9n_1)
and
![b=9n_2](https://tex.z-dn.net/?f=b%3D9n_2)
, and
![\mathrm{lcm}(a,b)=\mathrm{lcm}(9n_1,9n_2)=9\mathrm{lcm}(n_1,n_2)=378\implies\mathrm{lcm}(n_1,n_2)=42](https://tex.z-dn.net/?f=%5Cmathrm%7Blcm%7D%28a%2Cb%29%3D%5Cmathrm%7Blcm%7D%289n_1%2C9n_2%29%3D9%5Cmathrm%7Blcm%7D%28n_1%2Cn_2%29%3D378%5Cimplies%5Cmathrm%7Blcm%7D%28n_1%2Cn_2%29%3D42)
We have
![42=2\cdot3\cdot7](https://tex.z-dn.net/?f=42%3D2%5Ccdot3%5Ccdot7)
, which means there are four possible choices of
![n_1,n_2](https://tex.z-dn.net/?f=n_1%2Cn_2)
:
1, 42
2, 21
3, 14
6, 7
which is to say there are also four corresponding choices for
![a,b](https://tex.z-dn.net/?f=a%2Cb)
:
9, 378
18, 189
27, 126
54, 63
whose sums are:
387
207
153
117
So the least possible value of
![a+b](https://tex.z-dn.net/?f=a%2Bb)
is 117.
Answer: 75.36mm
i don’t know how to explain it i’m sorry