Keep cool: Following are prices, in dollars, of a random sample of ten 7.5-cubic-foot refrigerators. A consumer organization reports that the mean price of 7.5-cubic-foot refrigerators is greater than $320. Do the data provide convincing evidence of this claim? Use the =α0.05 level of significance and the P-value method with the TI-84 Plus calculator. 333 394 344 298 336 295 352 367 313 320

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is:

y/x of point b= y/x of point a

step-by-step explanation:

(i got the same question, this was the correct answer.)