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PLEASE HELP 15 POINTSAn item costs $420 before tax, and the sales tax is $16.80 .Find the sales tax rate. Write your answer as a percentage. Can you help me with this one math problem please?I emailed my teacher for help but she is not responding. No one can help me. A spillover effect is another name forA. interiorB. pollutionC. substanceD. externalityPlease select the best answer from the choices provided I have a graph the line problem that I don't know how to do It says I have to graph at least three points y=-1/4x+3 most of the answers for this test is wrong. Find the acceleration of a 600 kg car that experiences an impulse of 18,000 kgm/s in 0.05 seconds.I need help with this question, i dont understand it While looking at a cell under a microscope you notice there is no nucleus and thechromosomes are double stranded (they have 2 sister chromatids). What phase of mitosis isthe cell probably in? GIVING ALL POINTS PLEASE ANSWER CORRECTLY A) Planets that are made of gases tend to move more slowly than the smaller, rocky planets. True or false?B) Mercury, Venus, Earth and Mars are known as inner planets because they have rocks inside them. True or false?C) The gas planets can have rings and often have many moons. True or false? Lily and violet live 30 miles apart on a trail. They both start running towards each other with a plan to meet. Lily is moving at 4 miles per hour while violet runs 6 miles per hour. How long does it take for them to meet? what kind of verb is compatir? A) ir verbB) ar verbC) er verb Place the following events in the order that they occured.Industrial revolutionGreeks invented democracyRenaissanceHeight of the Roman empireMiddle ages in EuropeWWll Im failing please help! A cheesecake recipe says, Mix 12 oz of cream cheese with 15 oz of sugar. How many ounces of cream cheese are there for every ounce of sugar? Choose the element that has a smaller atomic radius :scandium or selenium When ringing up a customer, a cashier needs 30 seconds to process payment as well as 3 seconds to scan each item being purchased. How long does it take to ring up a customer with 24 items? Write and solve an equation to find the answer. What problems did African Americans face after the Civil War? 16. Using a standard 52 card deck, what is the probability of pulling the king of hearts if you aregiven two attempts (you will pull out one card and then another card)? Please help me Which of these is an affix that comes at the beginning of a word?A. SuffixB. RootC. AutonomyD. Prefix What is 9% of 50? Pls. The drawing below represents a 22-foot ladder with its base placed 10 feet from the bottom of a vertical wall. whatis the best value for x